regency period, one-seater, invented by the Hon. and Rev. Fitzroy Stanhope.

a small magnifier with a picture or in this case, a logo inside the lens

a viewing lens with a microscopic Collodion photographic image attached on a glass

A light two-wheeled, or sometimes four-wheeled, carriage, without a top; -- so called from Lord Stanhope, for whom it was contrived.