About Two Years Before The Mast by Richard Henry Dana Two Years Before the Mast is a memoir by the American author Richard Henry Dana, Jr., published in 1840, having been written after a two-year sea voyage starting in 1834. A film adaptation under the same name was released in 1946. The term "before the mast" refers to the quarters of the common sailors — in the forecastle, in the front of the ship. His writing evidences his later sympathy with the lower classes; he later became a prominent anti-slavery activist and helped found the Free Soil Party. Dana did not set out to write Two Years Before the Mast as a sea adventure, but to highlight how poorly common sailors were treated on ships. It quickly became a best seller