Thomas Gray spent most of his adult life promoting the idea of a passenger railway system for the UK and Europe.
It is very likely, as indicated by the sequence of events after his first edition, that Gray's first published proposals directly and significantly influenced the writings and actions of William James and the Stephensons, among many others, when they began to design and build the earliest passenger railway system in Britain.
Much as today, commercial interests over-rode "the good of the community", that underpinned Gray's advocacy of a General (National) Passenger Railway, to be funded jointly by Government and Capital(ists).
Thomas Gray, to this day, has been given little credit for the enormous contribution made by his work to the initiation and growth of passenger railway systems, throughout the world.
[2] The Belgians, second only to Britain in terms of their industrial expansion in the 19th century, saw the sense of Gray's proposals and built an integrated transport system from scratch on the basis of his publication.