lindazinger sent you information that I posted earlier.
Mahlon Huff Mercer's first wife was Mary Brady, according to her tombstone.
Atlee mercer son of Mahlon Huff Mercer married Elizabeth
Harry I Mercer, son of Atlee Mercer also had a son, named Atlee M. born 1920 in Pennsylvania, possibley Philadelphia.
Somewhere I found something that said that Mahlon was born in Chester county. Will have to look for it. Thats all I have right now. I do have the names of Atlee and Elizabeth Mercer's children if you would like that information.
Kathy Mercer for Ben Mercer - email@example.com