1887-1895. This railway, tested experimentally on a short track at Coney Island, was based on a light, narrow-gauge design with tracks under and above the locomotive, closer in concept to a monorail than a traditional railroad. While only four feet wide, it was meant to pull carriages along at speeds of over 60 m.p.h. This group consists of the following: a receipt for stock (1887) with a diagram of the locomotive, noting that stock certificates were yet to be issued; two additional handwritten receipts signed by Boynton, the second with some news of the railway’s construction; a printed 1891 notice regarding stock; three engraved stock certificates, two of which have a cut of the locomotive pulling carriages, and a third showing what appears to be a single, self-propelled passenger car. Minor creasing and wear; excellent condition.