Of twenty-two letters, nineteen were authored by Hooker. U.S. Senator of New Jersey John Conover Ten Eyck wrote the remaining three. Hooker sought Ten Eyck's help with repairing his reputation after the Battle of Williamsburg in May 1862.
The collection contains official battle reports, including two letters to Chauncey McKeever, one a report on the Battle of Williamsburg, and a report on the Battle of Fair Oaks. The collection includes one letter to L. Sherman and one to Samuel Wylie Crawford. Three letters to William Denison Whipple contain reports on Mill Gap and the Battle of Kolb's Farm.
A majority of the letters are of a personal nature, including one to William Pitt Fessenden and ten letters addressed to Dr. Bela N. Stevens, a physician at the Government Hospital for the Insane in Washington, D.C.