Hi Richard
Stuarts book is copied from A Brief Pictopial History of the Invalid Tricycle published by Mike Lawrece and F Nailer in 1976 - with a few additions - he even copied the photos - I have a copy and I shall send it to you.
Mike
No it isn't. I used it as a starting point but the two publications are fundamentally different. As regards
some of the photos, it's somewhat difficult to put a different picture in when said picture is still the only known half-decent picture around of such & such vehicle....
Good luck finding a Vernon Richard, as far as is known, the last complete car came off the road in 1968. I then found the only known surviving lump of one in 2006, being engine, starter and engine cradle, most of which was ultimately donated to the Hammond Gordon.