www.civilwardata.com lists a Civil War soldier as being buried in the named cemetery, but the Mercer Cemetery list does not have an index for that specific cemetery. Does it carry another name? Is it still in use?

The yankee soldier was Nathan G.McQuillen, who served PA in the PA 10th Reserve Infantry, Company G. Born 1836, died 1918.

Can someone verify his gravesite? Any relatives buried with him? TNX