From the same collection as the 1868 Helena, Montana bank deposit slips came this interesting document - A stock certificate for the "Opera Building Company" in Salem, Oregon. My knowledge of Salem history is dubious, at best, but I never knew there was a Salem Opera Building (I live in nearby Independence, OR). A quick Google search turned up a link to the "Reed Opera House" built in 1869-1870. Since the signature on the stock certificate is signed by Mr C. A. Reed, I think I got the right place!
http://www.reedoperahouse.com/
