Volume Twelve - Pre-Victorian to the Present Day - further aspects - Railway Magazine - Interview with Mr. Ammon Beasley - TVR - 1898 . . . .

The very earliest engines of which any description exists were six-wheeled engines with a large driving wheel and two small wheels as leaders and trailers. These were of most peculiar design ; the chimney came back from the smoke-box at the leading end, and then, proceeding along the outside of the boiler, rose vertically over the fire-box"