Richard Henry Dana 
Two Years Before the Mast [PDF ebook] 
A Personal Narrative of Life at Sea

After a bout with the measles that left his vision impaired, Harvard undergrad Richard Henry Dana signed up for a two-year engagement as a sailor, thinking that the fresh sea air might improve his vision. The diary that Dana kept during his stint on the open sea formed the basis for this wildly popular memoir, which was later made into a movie. A must-read for fans of rip-roaring nautical tales or social history buffs.