From Alice M. Coats, Garden Shrubs and Their Histories (1964) 1992, s.v. "Drimys":
When Sir Francis Drake sailed round the world in 1577-80, of the four ships accompanying the Golden Hind at the outset, the only ship that successfully rounded Cape Horn with him was the Elizabeth, captained by John Winter; the two ships separated in a storm and Winter turned back. Presumably he had sickness on board, for he sent a boat ashore to search out medicinal herbs. He returned in 1579 with a supply of Drimys bark, and for centuries before vitamin C was isolated, "Winter's Bark" was esteemed as a preventive and remedy for scurvy— correctly so, for an infusion of D. winteri sustained Captain James Cook and his crew in the South Pacific, and the naturalist accompanying his voyage of exploration, Johann Reinhold Forster, was the first to officially describe and name D. winteri.