Unknown Orr Family Photos

"I am hoping that somebody out there can help me solve a family photo mystery. I believe the three Cabinet Card photos are of Agnes Erskine Orr Graham and her siblings (Joseph Emmet Orr and Anna Elizabeth Orr Lamey & Mary "Mate" Bell Orr Palmer). I found a Victorian Family Photo Album in my husband’s mother’s home and among the photos it contained were these three. The album belonged to Elizabeth Martha Armstrong Lasher, my MIL's grandmother and my husband’s great-grandmother. Elizabeth would be related to Agnes through the marriage of her father, Martin Armstrong to Agnes' aunt Mary Orr. If somebody out there can confirm any of the identities of the sitters in the photos that would be amazing!" - Alicia Johnson Brewer