Leav'h City & Pikes Peak Express Co., Jun 23, clear cds on cover addressed to Denver City N.T., entered the mails with "Saint Louis, Mo., Jun 20, 1859" origin cds, Very Fine and scarce. Estimate  $3,000 - 4,000. This was the first express service between Denver City and Leavenworth City, charging 25¢ per letter. This marking is known used only from April to July, 1859. $0 (Image)