Endorsement of Abraham Lincoln to Unknown, [6 December 1847 - 3 March 1849]1
At the request of Mr Crosby, I most cheerfully state that I concur fully in the foregoing certificate of Judge ^Treat–^2 It is thought not improper for me to add, that I am the Representative to Congress for the District in which Mr Crosby resides–3
A. Lincoln
1Abraham Lincoln wrote and signed the endorsement. The host document has not been located.
2Roy P. Basler identified “Mr. Crosby” as J. W. Crosby, without attribution. Abraham Lincoln could have been referring to Israel W. Crosby, but the editors could not make a positive identification.
Roy P. Basler, ed., The Collected Works of Abraham Lincoln (New Brunswick, NJ: Rutgers University Press, 1953), 1:352.
3The Thirtieth U.S. Congress met from December 6, 1847 to March 3, 1849. Lincoln represented the Seventh Congressional District, which included the counties of Cass, Logan, Marshall, Mason, Menard, Morgan, Putnam, Sangamon, Scott, Tazewell, and Woodford.
U.S. House Journal. 1848. 30th Cong., 1st sess., 15; U.S. House Journal. 1849. 30th Cong., 2nd sess., 669; Howard W. Allen and Vincent A. Lacey, eds., Illinois Elections, 1818-1990 (Carbondale and Edwardsville: Southern Illinois University Press, 1992), 120.

Autograph Endorsement Signed, 1 page(s), Lincoln Collection, Abraham Lincoln Presidential Library and Museum (Springfield, IL)