Sherman's Memoirs again, with the only added geo clue being: "Moore's house and plantation were on Bayou Robert, about eight miles from Alexandria."

I didn't realize that Sherman and the Gov. were that close.

From: The National Tribune (Washington, DC) 30 Jul 1896 (Page 01)

http://chroniclingamerica.loc.gov/lccn/sn82016187/1896-07-30/ed-1/seq-1/#date1=1850&index=6&rows=20&words=Gov+Moore&searchType=basic&sequence=0&state=&date2=1922&proxtext=%22Gov.+Moore%22&y=12&x=19&dateFilterType=yearRange&page=1