You are correct...Catharine was the daughter of David Xander and Hannah Blank (both parents were born in Lehigh Co., PA). I have her deathdate as June 1876.
Robert F. Carter was b. 25 Jan 1836 and d. 1874.
David's sister, Susannah Xander, was married to my gggreatgrandfather, Daniel Mosier, of Crawford Co., PA.
I have an online family tree on RootsWeb WorldConnect Project that you may view if you'd like. Here's a link:
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?db=mosier464...David Mosier Miller (in Akron, OH)