Collected Works of Abraham Lincoln. Volume 6.
Lincoln, Abraham, 1809-1865.
To Solomon Foote 
Hon. S. Foote Executive Mansion
My dear Sir: Washington, 1863
Mrs. L. requests me to invite you to accompany us to the opera this evening. If you accept, be here at half past 7 P.M. Please answer by bearer. Yours truly, A. LINCOLN