A 12x10 negative. A starboard broadside view of the wooden hulled light vessel at moorings on the Mouse station in the Thames Estuary during a Thames Barge Match. Her lantern is raised and she has a mesh ball at the masthead. Her cabin has rectangular windows and not circular scuttles. Her crew are on deck looking at the photographer's boat. The masts and sails of spritsail barges can be seen beyond her.