Key figures: Captain James Cook, Captain Charles Clerke, William Anderson, David Samwell, Joseph Banks
Summary
During 1778, Captain James Cook’s third great Pacific voyage produced unprecedented scientific documentation of the northwestern coast of North America, the Arctic regions, and the Pacific coastline from California to the Bering Strait. After discovering the Hawaiian Islands on January 18, 1778, Cook turned north and spent the remainder of 1778 systematically charting the American Pacific coast — work that expanded European geographic knowledge, catalogued new plant and animal species, documented indigenous peoples of the Pacific Northwest, and definitively demonstrated the non-navigability of the Northwest Passage despite its theoretical importance to trade and empire.
The expedition’s scientific achievements in 1778 extended beyond mere charting: the naturalists aboard (principally William Anderson and David Samwell) collected specimens, recorded observations of indigenous cultures and economies, documented previously unknown fauna and flora, and created detailed charts that remained the standard reference for the region for decades. Cook’s published account, when it appeared in 1784, became one of the most influential scientific narratives of the Enlightenment, shaping European understanding of the Pacific and establishing exploratory science as a crucial tool of imperial expansion.
The Quest for the Northwest Passage
The Northwest Passage — a hypothetical navigable sea route connecting the Atlantic Ocean to the Pacific Ocean across the top of North America — had obsessed European geographers and merchants since the 16th century. In the 18th century, the quest took on new urgency: the opening of such a route would dramatically shorten the sea voyage from Europe to East Asia, potentially reconfiguring global trade and maritime advantage.
Earlier attempts to find the passage from the Atlantic side (from Hudson Bay, for example) had failed. In 1776, the British Admiralty, confident in Cook’s navigational genius and the seaworthiness of his ships, authorized a third expedition to approach the passage from the Pacific side. The logic was sound: Cook had already mapped vast stretches of the Pacific; a final push northward from the Hawaiian Islands to Alaska and the Arctic could definitively answer whether the passage existed.
The expedition departed Plymouth in July 1776 with two ships: HMS Resolution (Cook’s flagship) and HMS Discovery (commanded by Captain Charles Clerke). Beyond the immediate goal of finding the Northwest Passage, the Admiralty instructed Cook to gather hydrographic, navigational, and scientific information about all lands encountered — a remit that turned the voyage into a comprehensive scientific expedition.
Cook’s 1778 Coastal Survey
Hawaii to the Pacific Northwest
After departing Hawaiian waters in early February 1778, Cook shaped course northeast for the Pacific Northwest coast. The expedition first sighted the North American coast on March 7, 1778, at Cape Foulweather (present-day Oregon) — which Cook named for the storms that immediately drove the ships offshore — then began a methodical northward survey. Cook and his officers charted the coast with unprecedented precision, using the newly perfected chronometer technology (carrying chronometers by Kendall and Arnold) to determine longitude accurately. This technological advance allowed Cook to produce maps far more accurate than any previously available.
The Columbia River and Nootka Sound
Driven far offshore by heavy weather, Cook sailed past the mouth of the Columbia River in March 1778 without recognizing it as a river, and his charts did not record it. This omission proved consequential: the bay was named “Deception” only a decade later, by the British fur trader John Meares in 1788, and the Columbia was first entered and named in 1792 by the American captain Robert Gray aboard Columbia Rediviva, whose voyage provided a basis for later American territorial claims to the Oregon country — a claim Cook’s failure to chart the river inadvertently left open.
Cook anchored at Nootka Sound (present-day Vancouver Island, British Columbia) from March 29 to April 26, 1778 — nearly a month of repairs and reprovisioning. This extended stay produced the most detailed cultural documentation of any indigenous nation encountered during the voyage. Cook’s journal described the Nuu-chah-nulth people’s sophisticated sea-mammal hunting techniques, their carved cedar dwellings, and their trading acumen; his men acquired a large number of sea otter pelts at modest cost. The later realization in Canton that these pelts commanded prices of 100–120 Spanish silver dollars apiece — compared to a handful of iron or copper trade goods paid for each — triggered the Pacific maritime fur trade that would dominate the coast’s history for the next four decades. Nootka Sound itself became a contested diplomatic flashpoint in the 1789 Nootka Crisis, when Spain seized British trading vessels there, nearly sparking war between Britain and Spain.
Indigenous Peoples and Trade
The Pacific Northwest coast was densely populated by indigenous nations — including the Tlingit, Haida, Kwakwaka’wakw, Nuu-chah-nulth, and others — organized into hierarchical societies with sophisticated economies based on salmon fishing, sea-mammal hunting, and trade networks stretching from the Arctic to the Pacific. Cook’s crew encountered these peoples over many weeks of trading and interaction, documenting their material culture, wealth displays (including the potlatch ceremony), and navigation techniques.
Most significantly, Cook’s men discovered an unexpected economic opportunity: sea otter furs were abundant along the coast and, when traded at Chinese ports in Canton during the expedition’s subsequent visit in late 1778 and early 1779, commanded extraordinary prices — individual pelts that had been acquired for a few iron nails or buttons sold for 100–120 Spanish silver dollars each, a return of 30–50 times the acquisition cost. This discovery triggered the Pacific maritime fur trade, which would become one of the most lucrative maritime enterprises of the late 18th century, drawing American ships (the first American vessel, Columbia Rediviva, entered the trade in 1787) and British traders to the Pacific Northwest for decades to come, and ultimately devastating sea otter populations along the entire coast.
William Anderson, the expedition’s naturalist, recorded detailed observations of indigenous canoe construction, fish-preservation techniques, and social hierarchies. His journal entries and drawings documented a sophisticated and thriving indigenous economy — knowledge that, while scientifically valuable, would ultimately enable the commercial exploitation of the region.
Northward into the Arctic
By summer 1778, Cook had charted the coast from Oregon to the southern coast of Alaska and through the Gulf of Alaska. He passed through the Bering Strait and pushed northward into the Arctic Ocean. On August 18, 1778, Resolution and Discovery reached their highest latitude: approximately 70°44’ North, in the Arctic Ocean near Icy Cape (present-day Alaska), which Cook named as he retreated from the ice. There, a wall of solid pack ice, between 10 and 12 feet thick and stretching horizon to horizon, barred further progress. Cook probed the ice edge for several days, searching for a lead through the pack, but found none. By September 1778 he had acknowledged that the season was over and turned south. The failure to penetrate the ice proved the practical non-existence of a navigable Northwest Passage — at least via the Pacific approach in summer conditions — definitively answering the Admiralty’s principal geographic question.
The expedition spent the autumn of 1778 sailing south and west, passing through the Aleutian Islands and arriving at Unalaska, where Cook encountered Russian fur traders already established on the coast, an early sign of the competing imperial interests that would contend over the Pacific Northwest for the next century. Cook exchanged geographic information with the Russians and observed their methods of acquiring sea otter pelts from the Aleut people — confirming the commercial opportunity that his own observations at Nootka Sound had already identified.
Scientific Documentation and Collections
Botanical and Zoological Specimens
William Anderson, serving as surgeon and naturalist, collected plant and animal specimens throughout the 1778 coastal survey. Arctic foxes, previously unknown to science, were captured and documented. Plants from various latitudes were pressed and preserved. These specimens were eventually transferred to the British Museum and the Royal Society, enriching European natural history collections and providing the material basis for subsequent scientific study.
The expedition also documented marine fauna, including whales, seals, and sea otters, providing early systematic observations of Arctic and sub-Arctic marine biology.
Hydrographic Charts
Cook’s hydrographic charts were the primary scientific achievement of the 1778 season. Produced with unprecedented accuracy thanks to chronometric longitude determination, the charts represented the coast not as a vague outline but as a detailed, dimensioned geography with accurate distances, water depths, and the locations of islands, harbors, and river mouths. These charts were so detailed and reliable that they remained in use by navigators into the 19th century, and some features Cook named (Mount Fairweather, Turnagain Arm) retained his designations for centuries.
Meteorological and Astronomical Observations
Cook’s crews recorded daily meteorological observations: temperature, wind direction and force, barometric pressure, and sea conditions. These data, accumulated over months of sailing, contributed to early understanding of weather patterns in high latitudes. Astronomical observations — including lunar distances for longitude verification and stellar positions — added to the body of celestial data the Age of Exploration was accumulating.
The Death of William Anderson
William Anderson, the Resolution’s surgeon and principal naturalist, died on August 3, 1778, during the expedition’s passage north of Alaska. Anderson had been instrumental in documenting the expedition’s natural history. His death represented a significant loss; Captain Cook noted in his journal that Anderson’s skills as both physician and naturalist had made him invaluable. The remaining portions of the 1778 expedition, after Anderson’s death, were documented by David Samwell (a midshipman and surgeon’s mate) and the ship’s officers, though no replacement naturalist of Anderson’s expertise was available.
The Published Account and Its Impact
Cook himself did not live to see the publication of the third voyage’s account. He was killed in Hawaii on February 14, 1779. Captain James King, one of the expedition’s officers, edited the narrative and it was published in 1784 as A Voyage to the Pacific Ocean: Performed in the Years 1776, 1777, 1778, 1779, and 1780 (two volumes, with a third of charts). The book became an immediate and sustained bestseller — a rare achievement for a scientific narrative.
The published account shaped European understanding of the Pacific Northwest for a generation. It confirmed that no navigable Northwest Passage existed; it documented the wealth of sea otters in the region; it provided the first systematic, accurate account of the Pacific Northwest indigenous peoples; and it established Cook as the preeminent explorer of the age.
Significance
Cook’s 1778 documentation of the Pacific Northwest and Arctic regions represents the culmination of the Enlightenment’s project of systematically mapping the world. The voyage itself — occurring in the same year as the Franco-American alliance and the emergence of the United States as a nation — symbolized the global scope of the era: at the moment when the Atlantic world was convulsed by revolution, Cook was mapping the Pacific coast of North America, effectively claiming vast territories for Britain through the act of accurate geographic description.
The expedition’s scientific documentation also established exploratory science as a tool of imperial expansion. The charts, specimens, and cultural observations Cook’s voyage produced were not neutral scientific facts but the informational infrastructure that enabled subsequent European colonization and commercial exploitation of the Pacific Northwest. The sea otter trade, triggered by the expedition’s discovery, would devastate sea otter populations and restructure indigenous economies. The detailed knowledge of indigenous societies documented by Anderson and others would later enable more effective colonization.
Within science proper, Cook’s 1778 work advanced the state of hydrographic charting, natural history collection, and the systematic observation of non-European cultures and economies. His methods — meticulous charting, specimen collection, naturalist documentation — became the model for scientific expeditions throughout the 19th century. The voyages also demonstrated the practical value of chronometric longitude determination, confirming the investment in precision timekeeping as essential to modern science and navigation.
See Also
- Captain Cook Reaches Hawaii — Cook’s January 1778 encounter with the Hawaiian Islands (naming them the Sandwich Islands), which immediately preceded his northward survey of the Pacific coast
- Joseph Banks (1743–1820) — naturalist who had sailed with Cook on the first voyage (1768–1771) and, as President of the Royal Society from November 1778 onward, became the principal institutional advocate for publishing and promoting Cook’s discoveries
- Britain Declares War on France — the March 1778 war declaration that intensified Britain’s strategic interest in Pacific territories and the possible commercial advantages Cook’s voyage was designed to locate
- Total Solar Eclipse of June 24, 1778 — the eclipse observed across North America while Cook was surveying the Pacific Northwest coast; both events depended on the same body of Enlightenment astronomical science (chronometric longitude determination and lunar tables) that Rittenhouse and Maskelyne were simultaneously refining
- Leonhard Euler’s Advances in Celestial Mechanics — Euler’s 1778 work on perturbation theory directly improved the lunar tables on which Cook’s chronometric navigation relied