Letter from the Northridge Chamber of Commerce inviting people to attend and participate in the 3rd annual Northridge Stampede, a parade and horse show. The event was to be held June 3, 1951. The letter is signed by Jack "Cisco Kid" Mather, honorary mayor & sheriff, and Lauran Paine, horseshow and parade director. Cover letter describes classes of horses for show. Letter (correspondence), 11 x 8.5 in.