Hi,
I did find an obit for Elizabeth that confirms her as daughter of Sylvanus Ames. Do you have access to ancestry.com trees? If so, visit my entry for Sylvanus:
http://trees.ancestry.com/pt/person.aspx?ssrc=pt_t2898183_p-...There is lots of info on him on the web and in Ancestry, so hunt around. Let me know if you can't see the entry, and I'll send some links.
Todd