Just an FYI, if you are using Ancestry Library Edition rather than a paid Ancestry.com account, I don't think it's possible to contact a tree owner; you won't have access to Ancestry's messaging system at all, and there is no link available for contacting tree owners (in fact, I don't think you can even see who the owner of a public tree is through Ancestry Library Edition these days).

I seem to remember managing this somehow from Ancestry Library Edition in the days before they switched to ProQuest - although there was no inbox where you could receive a reply, I think you could at least send a tree owner a message with your direct contact information. That workaround doesn't exist any more, though.

Adam Turner