Mitchell, Donald Grant (1822-1908).  American Consul at Venice 1853-54, resided at his estate "Edgewood" near New Haven, Ct.  Agriculturalist and author; used the pen name "Ik Marvel." Wrote Reveries of a Bachelor, My Farm at Edgewood, etc.  ALS, 1 p., Edgewood, August 22, 1864. To Mssrs. Ticknor & Fields, settling his account.  A few pencil notes on the front page. Very good.