Correspondence, journals, logs, and other papers documenting Winslow's naval career. Includes journal (1834-1837) kept during his first cruise aboard the frigate Brandywine to South America, subsequent shore duty in Rio de Janeiro, Brazil, Montevideo, Uruguay, Buenos Aires, Argentina, and aboard the sloop of war Erie; journals and logs recording his experiences aboard the sloops of war Marion and Dale in South American waters (1839-1842) and cruises (1854-1859) on the sloops of war Falmouth and Saratoga and the frigate Merrimack; and letterbook (1861-1862) from his commands of the steamer gunboats Water Witch and R. R. Cuyler during the Civil War blockades of Alabama, Florida, and Louisiana ports. Correspondents include his wife, Mary Sophia Nelson Winslow, and other family members.