Henry Warren Howe was a member of the 30th Massachusetts during the war. Howe's regiment was organized in December of 1861 and served in Virginia before it was sent to Ship Island. From February 12th - April 15th, the 30th Massachusetts garrisoned Ship Island. The regiment was attached to the Department of the Gulf in August 1862 and served in Louisiana until the summer of 1864. Howe wrote a book following the war titled, Life of Henry Warren Howe, Consisting of Diary and Letters Written During the Civil War, 1861-1865: A Condensed History of the Thirtieth Massachusetts Regiment and Its Flags, together with Genealogies of the Different Branches of the Family.
Howe's April-May 1863 entries: