Original manuscript from the Adams Family Papers, Massachusetts Historical Society.

John Quincy Adams diary 26 (almanac), 4 March 1802 - 20 September 1802. 212 pages (9 manuscript pages and 5 blank pages interleaved with 198 published pages of the Massachusetts Register); Page dimensions: 14.5 cm x 9.0 cm (5-3/4 in. x 3-1/2 in.).