Hancock, Colo., Jun 4, 1882, cds on 1876, 3¢ green entire to North Guilford, Conn., with original enclosure on Denver, South Park & Pacific Railroad Co. letter datelined "West End of Tunnel"; rough opening at left, F.-V.F., a very rare postmark. Estimate  $150 - 200. Hancock served the workers who built the famous Alpine Tunnel. Its main population peak was in the 1880's and 1890's while the tunnel was being built. Mining was secondary in Hancock. The tunnel was completed in 1881, but the train ran through Hancock carrying miners, passengers and supplies. It is said Mark Twain took the ride one time just for the experience. $0 (Image)