Hi Emma
Looks like you made a great start ...
The Galtress family is a life long interest of mine ever since I found out it was my grandma's maiden name.
I have more information about your ancestors if you are still searching.
All the Galtress families eventually trace back to the York area and the ancient Forest of Galtres.
I have a detail tree of the Birkenhead branch and where they fit in .. the result of painstaking research by Eric Page in the 1970's and 1980's
Happy to help
Regards
Robin
ps our flock name is Galtress and the Galtress sheep can be seen at
www.scottishwool.com