Humphreys wrote the book Field camp, hospital and prison in the Civil War, 1863-1865. (Boston, 1918). This is the only published book about the Massachusetts Second Cavalry written by a member of the regiment.
The following is from The Clapp Memorial, (Boston, 1876), 275
Son of Sarah Blake Clapp, 1808-1850 and Henry Humphreys, 1801-
Born April 1, 1838; m. April 15, 1868, Kate J. Mattoon, of Greenfield. He graduated at Harvard College in 1860, and from Divinity School, Cambridge, July 14, 2863, when he was ordained as Chaplain to the 2d Mass. Cavalry, and went to Virginia and staid till the war was over; during this time, he was taken prisoner and confined at Macon, Ga., and Charleston, S.C., from which place he was released, and joined his regiment again. He was installed Nov. 29, 1865, as pastor over the Unitarian Church at Springfield; resigned in January, 1872; installed at Framingham Nov. 2, 1873.
Lists their children
Humphreys gave the dedication address for the Soldiers Monument on Meeting House Hill.