I am working with nwpioneer writing a book about the Richard Slack sr family. So far we have not been able to find anything more about Chrisiana Anderson, other than they were married in Jan 1830 ( Chrisitan Guardian obituary 5 Mar 1884 p. 79) and the family emigrated to NY in 1853 and then to Melancthon in 1854. I have some more info on Richard but not Christiana. Contact me if you wish me to share the rest with you.