In Papers of Isaac Briggs, in a folder: "Miscellany: Samuel Briggs Patent for Invention re Application of Steam"
"Certificate, with autographic signature, John Quincy Adams, City of Washington, A.D. 1817, to accompany a true copy of a patent of 28th May 1817 to Samuel Briggs and Isaac Briggs, James Monroe, President, Richd. Rush, Acting Secy. of State." (Adams Papers Office files, Box 5, Order 15 of NP Search). --SEG, 2/17/2010