Drawing Produced by John Llewellin of a Tram Engine Designed by Richard Trevithick

Line drawing, scale 1 : 12, of a Trevithick locomotive, credited to John Llewellyn.

It is believed to be a design for a 3-foot gauge locomotive for Coalbrookdale. The drawing was apparently presented to Patent Office in 1862 by William Menelaus to whom it was given by John Llewellyn's nephew, William.