Roswell Hawkes Lamson was an officer in the United States Navy during the American Civil War.

The first USS Gettysburg was a steamer in the United States Navy. The ship was built in Glasgow, Scotland, in 1858, named RMS Douglas, and operated by the Isle of Man Steam Packet Company in the United Kingdom between Liverpool, England, and Douglas on the Isle of Man until November 1862. She was then sold to Cunard, Wilson & Company on behalf of the Confederate agents Fraser, Trenholm & Company for use by the Confederate States of America during the American Civil War. Renamed Margaret and Jessie, she operated as a blockade runner until her capture by the Union on 5 November 1863. The ship then was commissioned into the Union Navy on 2 May 1864 as USS Gettysburg.