The Warren H. Cudworth papers contain 11 Civil War era letters. The first 8 letters are from Warren to his sister Fannie Gile. Warren writes from Harrison's Landing, James River; a camp near Alexandria, Virginia; Rikers Island, New York; and a camp at Brandy Station. He discussed his movements and the situations he encountered, such as: seeing a demonstration of the breech-loading Armstrong guns (October 5, 1863); and marching close to Washington to find rebels retreating under General Meade (October 23, 1863). In a letter from September 11, 1862, Cudworth criticized the Union Generals for being the cause of the army's misfortunes and "not [being] equal to the positions they are called upon to fill and consequently, as the rebel generals are, they have got the worst of it in nearly every battle." In his last letter, Cudworth mentioned the lack of transport out of Savannah, Georgia, and the unhealthy living conditions, which caused many of the men to become sick as they waited to return home from the war.
Two letters, one from 1864 and one from 1865, are from Jesse L. Osgood to his uncle John and Aunt Fannie, respectively. Osgood, who was in the Union Army stationed in Charleston, commented on McClellen's nomination to the Democratic ticket for the presidency, but thought "that Lincoln is as good a man as they will find” (September 1, 1864). Another letter was from Dr. James F. Upham, who seemed to know Jesse Osgood. Upham wrote of being stationed outside Washington and anticipated being discharged, because the war was coming to an end.