We've made a little progress on the Snider line in the past several months:
We've added a new section in the Adams-Hastings binder for the Howell line, with interesting comments on the family. The main researcher, Robert Howell, indicates a picture exists of Elnora Howell and Jacob Adams, and also pictures of Elnora's ancestors. The last comments, and e-mail address, for Robert Howell are in 2001, and I have been unable to locate him. I have posted several queries to the Howell genealogy forums seeking information on his whereabouts.
What's left to do is find Robert Howell or his descendants, and keep looking for John Snyder's ancestors.