Journals documenting Evans's service as chief surgeon aboard the USS Constitution in 1812 and 1813 and the USS Independence in 1815. Sailing out of Boston, Mass., the ships patrolled the U.S. east coast and voyaged to El Salvador, Brazil, and Spain. Evans described sea battles with British ships including the Guerriere and the Java, shore excursions in ports of call, and the process of copper smelting at the Paul Revere & Sons rolling-mills. Also includes a journal containing medicinal recipes and notes from medical lectures, a medical diploma, and two documents concerning John W. Brown, a military furlough (1863) and certificate of disownment from the Society of Friends (1868).