Glass plate negative featuring four full-length portraits of J. Mortlock, Park Keeper at Windsor Great Park. He is shown standing, holding a rifle and dressed in a velvet coat with gold trimming and a top hat. All images were taken at the photographer's studio.

J. Mortlock was appointed Park Keeper in May 1840.

The glass plate negative has been photographed showing the coated side and therefore the image appears laterally reversed. Prints from this negative do not seem to exist in the Collection, apart from the bottom left which is represented by RCIN 2910332.