Letter
William Ballard Preston to Commodore Sloat, commandant navy-yard, May 15, 1850
Mr. Preston, Secretary of the Navy, to Commodore Sloat, commandant navy-yard [Telegram.] Navy Department, May 15, 1850. Commodore J. D. Sloat, Commandant Navy Yara, Portsmouth, Virginia: Prepare the United States…