1850 ADVERTISING ENVELOPE/BROOKS AND GREEN COSMORAMIC VIEWS OF PROPERTY. Envelope London to Hurstpierpoint, Sussex with a three margined 1d imperf (SG8) lettered AC tied London "12" inland numeral and backstamped AP 16 1850. Within very fine printed advert promoting their "Cosmoramic Views" of property for sale using an "aerial prospective". Fascinating usage. (Ref 104734).