My understanding (and it may be a load of rubbish) is that the term came from
the way the Post Boys used to ride the guide horses (lead horses in the front
of a team of four or more). Trotting horses were used for pulling carriages and
gaited horses were used for horse back riding.
The Post Boys were needed because the streets were narrow then (and many still
are now), and it was difficult for the carriage driver to guide the carriage
around some of the tricker parts of town. Young boys were employed to do this
job and some young lad invented posting out of self preservation and it caught
on throughout the rest of England and eventually Europe. The French still
sometimes refer to it as L'Anglaise (The English).
Sounds good anyway. 80% of what we are told turns out to be wrong, fortunately
99% doesn't matter. Makes a good story if nothing else.
Nicco
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E-Mall BBS Poway California 619 679 1158 & 619 679 9327