Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 136,062 pages of information and 218,544 images on early companies, their products and the people who designed and built them.
This was an unusual and clever design, as the attachment was meant to replace the rear wheel of a bicycle. The unusual feature was the 40cc two-stroke rotary engine in which the crankcase stayed still and the rest revolved around it. It was a complicated affair that made the porting, balance and other normally simple tasks difficult.
The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X