Letter was addressed to Henry Adams of Royalton. The 1900 census shows the following Henry Adams who was presumably the recipient:

CENSUS: 1900 Royalton precinct, Fairfield Co., Ohio, ED 2 SH 3B
ADAMS, Sussannah, head, b Sep 1850, 69y widow b PA, parents b PA, farmer, had 9 ch 8 living
", Henry, son b Dec. 1857, 42y single b PA, parents b PA, farm laborer
", David, son b Mar 1863, 37y single b OH, parents b PA, carpenter