Most of the 50th New York Engineers are still participating in the siege of Petersburg and James H. McDonald of Seneca Falls is still in the news.
From a Seneca County, New York newspaper in March 1865:
BREVETED [sic] MAJOR. – The appointment of Capt. Jas. H. McDonald, of the 50th N.Y. Vol. Engineers, as Brevet Major, was confirmed by the U.S. Senate, on the 14th ult.