On Tue, 27 Oct 2009 07:55:11 -0700, Andy Dingley wrote:
The first coal-fired steam locomotive was Stephenson's Rocket, the
crucial innovation being the use of a blastpipe to encourage draught
on the fire.

What did Trevithick's efforts use, then? I did did some googling but
couldn't find any mention of the actual heat source used.