I have three RR passes from my family archives issued by: Chicago & Alton, Chicago Rock Island and Pacific, and the Chicago Burlington & Quincy.
The passes were issued to my g.g.Grandfather, a clergyman. They are not truly passes, but look like them and allow him to ride for 1/2 fare.
They are all dated: "1867".
I am just curious about how many passes are known, from this early year...or earlier.