This collection consists of a single, four-page letter written by United States Senator Lafayette Sabine Foster in the Senate Chamber on June 9, 1862, to Union General Fitz John Porter, then commanding the Army of the Potomac's V Corps. Foster congratulates Porter on his success during the Battle of Hanover Court House the previous month, writing "[N]othing more billiant has been done durin gthe war." Foster also shares his concern that recent floods may hinder support to the army and his opinion that Union Army "operations in the Valley of the Shenandoah look rather odd." The letter is accompanied by an envelope addressed to "General F. J. Porter, Comdg Corps." The envelope bears a note over Porter's initials, reading "I shall do so with pleasure as it will be my duty[.] I did so at Hanover."