The Reynolds Family Papers digital collection features the correspondence of brothers William and John Fulton Reynolds of Lancaster, Pennsylvania. 

The digital collection includes letters from William Reynolds to sister Lydia Moore Reynolds dated 1834 to 1838, prior to his departure with the U.S. Exploring Expedition. It also includes letters between William Reynolds and father John Reynolds dating 1824-1845 and between William Reynolds and sisters Harriot, Eleanor and brother James, 1853-1877. Further letters by William Reynolds from the 1838-1842 U.S. Exploring Expedition letters are available transcribed in print in Voyage to the Southern Ocean by Anne Hoffman Cleaver and E. Jeffrey Stann.