None have been written on but 2 look like they may have been in scrap books

These are from the collection of my Grandmother who was born in 1899.  I have gone through her photo books and photos and the people on these photos have not been identified after many years of trying.  

Size of these - approx 3 1/2" x 5 1/4"

The group of 4 people do have the name of photographer Edward Ter Maat Chicago Ill on the back

Other photos are of: man, 2 young ladies decked out for a wedding, and a young girl in her Communion dress (dated 1916)