Statistics for occurrence #1 of “First Sergeant Louis W. Swan” in chapter 3, page 76 of Caroline E. Whitcomb, History of the Second Massachusetts Battery of Light Artillery (Nims' Battery): 1861-1865, compiled from records of the Rebellion, official reports, diaries and rosters:

..., 1865, Captain Nims resigned his commission. Lieutenant Marland was promoted to fill the vacancy, the other lieutenants were advanced, and the second lieutenancies were filled by the promotion of First Sergeant Louis W. Swan and Sergeant Jacob M. Ellis, both of Boston. The battery was next ordered to report to General Steele for active service, and accordingly arrived at New Orleans on March 7, where it took transpor...
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