*Dearborn volunteered for service in Benedict Arnold's expedition to Quebec. In the battle, in which Montgomery was killed and Arnold seriously wounded, Dearborn was taken prisoner and confined for a time at Quebec. [Source] It was thought that General Dearborn was past his prime in the War of 1812.
A guide to Henry Dearborn's papers found here, including:
Dearborn Historical Commission
Papers and Microfilm: 1761-1826, 2 feet and 92 microfilm reels.
The collection covers Henry Dearborn’s career as officer in the American Revolution and the War of 1812, as secretary of war (1801-1809), collector of the Port of Boston (1809-1812), and minister to Portugal (1822-1824).