The Northeast Passage is a legendary Arctic route to Cathay and the Spice Islands of Asia, imagined to run through the Ice Seas north of Russia. In the novel it is less a charted waterway than a high-stakes possibility: a way around the southern routes that Spain and Portugal controlled, and a reason for Dutch navigators to risk years in the polar wastes.

The Route and Its Uncertainty

The passage is presented as a sought-for northern way to Asia, not as a proven or navigable route. Its possible course remains open even in conversation: it might lead east or west. The question matters because the familiar alternatives were politically constrained. John Blackthorne argues that Spain and Portugal block both southern routes, making a northern route necessary if the Dutch are to reach Asia independently.

That ambition belongs to a world in which navigation itself remains precarious. Charts are so vague as to be nearly useless, and sailors have no reliable way to determine longitude. A pilot’s rutter can preserve detailed observations of courses, depths, currents, winds, storms, shoals, and safe anchorages, but its accuracy depends on the pilot and on every stage of copying or translation. Such practical knowledge could make a voyage safer; it could not turn an unverified passage into a known one.

Veerman’s Arctic Expedition

Blackthorne had already joined Kees Veerman on the Dutchman’s second voyage to search for the Northeast Passage. The expedition spent two years looking for the route in the Arctic wastes. Veerman died there, along with eighty percent of the crew, and Blackthorne turned back, leading the surviving men home. The search therefore produced neither a confirmed passage nor a return to Asia by the northern way; its immediate outcome was loss and retreat.

The scale of that failure gives the route its human cost. A northern alternative to Iberian-controlled seas promised strategic independence, but the expedition’s progress depended on endurance in a region where the crew could be decimated and its leader could die before the objective was reached. Blackthorne’s survival and responsibility for bringing the remainder home are part of the passage’s history in the novel, even though the route itself stays beyond his grasp.

Blackthorne’s Continuing Belief

Years after the Arctic voyage, Blackthorne is asked whether anyone will ever find a northern way to Asia, east or west. He answers that it will be found, by the Dutch or by the English. His confidence contrasts with the expedition’s disastrous result: experience has shown him the cost of searching, but not persuaded him that the route is impossible.

The Northeast Passage thus links Blackthorne’s earlier career as an explorer to the larger contest over maritime access and trade. It represents a route still withheld by geography, inadequate navigation, and the dangers of the Arctic, while also embodying his conviction that a new way can be found when existing powers close the old ones.