Photo's card stock- Cabinet card into the 1866 popular into the 20th century. Photographer's imprint their name and place of business at bottom of the picture. This might help you identify your photo's.
I have been doing genealogy for 28 years. My Great Aunt Ella introduced me to this fascinating adventure when I was a teenager and boy did I get hooked. She inspired me and taught me the importance of my roots and where I came from.