Around 1916-1919, my grandmother Agnes Williams was the piano player at one of North Dakota's first Nickelodeon Theaters.
A tremendous fan of early Hollywood pictures, Agnes wrote letters to every actor of the era— and they often replied to her fan notes, enclosing a signed photographic print of themselves.
There are names we still recognize today: Charlie Chaplin, the Gish sisters, William S. Hart, Theda Bara.
But virtually all these early picture stars were huge celebrities in their period, and you will find their "star" on the cement of Hollywood Blvd today.
I've included wikipedia or IMDB links where I could find them: I think you'll find their lives fascinating, and quite a parable for our own pop culture icons.
There are a couple photos I cannot identify, and if you are a silent film buff, please do add your notes in the comments-- I will be grateful!