Capt. Cook's Shipboard Hygiene

From The Wide Wide Sea: Imperial Ambition, First Contact and the Fateful Final Voyage of Captain James Cook, by Hampton Sides (Knopf Doubleday, 2024), Kindle pp. 15-17:

DURING HIS TWO voyages, Cook had shown himself to be a benevolent though strict leader of his own men—sparing with the lash and solicitous of his crew’s happiness, comfort, and health. These should be attributes for any good naval officer, but so many ship captains of the era could be unimaginably brutal in their punishments, tyrannical in their command style, and indifferent to conditions belowdecks. The Royal Navy, it was famously said, was “manned by violence and maintained by cruelty.”

Cook, however, was a different sort of captain. He constantly experimented with schemes for shipboard hygiene and diet. He knew that prolonged dampness and darkness were eternal enemies that worked in concert and must be mercilessly fought. Many diseases killed sailors on long voyages, but most of them, Cook found, could be prevented by maintaining strict cleanliness, especially in the galley.

Germ theory was only a nascent and controversial concept among medical scientists at the time, but Cook intuitively seemed to grasp its essence. Ever at war against grime, he kept his men scrubbing the decks with soap and vinegar, and often ordered smoking fires, set in pots, to be lit deep within the ship. His perpetual campaign against cockroaches, rats, weevils, and other vermin was resourceful, almost scientific, in its approach. “To cleanliness, as well in the ship as amongst the people, enough attention cannot be paid,” Cook insisted. “The least neglect occasions a putrid and disagreeable smell below.”

Then there was the most dreaded maritime disease of all: scurvy, a ghastly disorder that was considered an almost inevitable occupational hazard of long ocean voyages. During the Age of Sail, it was generally assumed that scurvy would kill off half the crew members on any lengthy expedition. The malady’s progression was all too well known: spongy gums, fetid breath, protuberant eyes, scaly skin, a breakdown in the tissues and cells of the body, convulsions, and, eventually, death.

But amazingly, during his two odysseys, it seemed that Cook had beaten scurvy. On his second voyage, the Resolution was at sea for three years, but not a single one of his men died of the disease—or even, it seems, developed advanced symptoms. This was a historic breakthrough. He didn’t understand scurvy’s true cause, its etiology; that it resulted from a deficiency of vitamin C would not be determined until the 1930s, when scientists deduced the compound’s chemical structure.

But Cook, following his own hunches while building on a host of older theories, had put in place an astoundingly efficacious system of prevention. A Scottish surgeon named James Lind had demonstrated as far back as the 1750s that scurvy could be treated by consuming citrus fruit, but it took decades before his ideas were aggressively adopted. Building on Lind’s findings, Cook insisted that whenever possible, his sailors—accustomed to a diet of salted meat and stale biscuits—consume fresh fruits, vegetables, and greens. On the Resolution he kept some strange-sounding supplementary items on the menu as well, such as carrot marmalade, wort of malt, rob of orange, inspissated lemon juice, and a concoction known as saloop, which was steeped from the root of a common meadow plant, Orchis mascula.

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Cook hadn’t really conquered scurvy, though—the particular lessons he’d learned through hard and patient experimentation would be unlearned and then learned again, dismissed and revived in piecemeal fashion, over the next several decades. But for now, the Admiralty viewed Cook’s apparent mastery over the disease as possibly an even more consequential achievement than proving the Southern Continent’s nonexistence. So many sons of England, so many sons of so many countries, had died of this horrible malady. It has been estimated that nearly two million European sailors perished from scurvy between 1600 and 1800. The notion that a thousand-day voyage could be undertaken without the disease’s appearance represented a radical shifting of the possibilities; it meant that His Majesty’s ships could range wider and longer, extending the reach of the Crown to the world’s most distant nooks and corners, to complete the maps of the globe.