I realize that this is a bit old, but I think I might have your answer. I have a book for the Keyser family history that was written by a relative of mine in the 1980's. If the Henry Keyser you're looking for was born on Feb 28, 1858, his father was William Preston Keyser, B. 3/21/1837, D.9/19/1917. His mother would have been Malissa Jane Moore, B. 12/13/1841, D. 2/4/1937. See if this lines up with what you have found so far.