Haydon and Urry were an Islington based manufacturer of film equipment as well as producing films of their own. The firm was formed in 1893 and was active until it's patents were transferred to a new company in March 1900. It was mainly active between 1896 and 1898. The Eragraph was patented in 1897. The model discussed by Barnes differs from the present lot in the placement of the lens which is mounted on the front plate rather than between the two chassis plates.

The reference cited above provides a detailed history of the firm and products and shows different examples of the Eragraph projector including a model owned by Eric Lange.