Complex sentence: She arrived New York 7 May decommissioned there on 15 May 1865, and was sold at public auction to James Hooper, re-commissioned the "Somerset", 28 September 1865, the steamer remained in merchant service until 1881.
Split into simpler sentences: She arrived New York 7 May decommissioned there on 15 May 1865, and was sold at public auction to James Hooper. Recommissioned as the "Somerset" on 28 September 1865, the steamer remained in merchant service until 1881.