I would be so happy to see copies of your photos - Barb's of Agnes Airth and David Barr and Jean's of their children. Bob Barr was my great-grandfather and my grandmother, Mary Jackson Barr, was named after his sister Mary Barr Jackson.
Jean, It sounds like you have a scanner, so perhaps after your trip you could email the image to me. Barb, if you don't have a scanner, I'd be happy to pay for a copy.
All I have to share in return is a wedding photo of my grandparents, Mary Jackson Barr and George Washington Terrill circa 1908, and a photo of the home of Robert Barr and Isabelle Douglas Barr in Grafton North Dakota. Isabelle is sitting on the porch and grandma and one of her sisters stand next to the porch. I believe this photo was taken before Grandma got married. I don't have a scanner yet, but am planning to get one within the next month (any recommendations?). Or I can have copies made if you are interested.