1. G.S. was a British inventor and engineer. He is famous for building the first practical railway locomotive.
2. In 1829 he designed a locomotive known as the Rocket,, which could carry both loads and passengers at a greater speed then any constructed at that time.
I think this is his main invention.
3. R,S.was a British civil engineer.
4. He built several famous bridges including the Victoria bridge in Northumberland, the Britannia bridge in Wales, two bridges across the Nile in Damietta in Egypt and the Victoria bridge in Montreal ,Canada.