I vaguely recall a mention of the hobbit on a Tekumel mailing list (the moderated one, I think). IIRC, it came through a "nexus." I don't know about the "nexus" to old Mexico, but it doesn't seem weirder than other destinations.
Maybe the hobbit was dead by the time you joined Barker's campaign?
Apparently the whole Mexico thing happened when a character cast an inter-dimensional spell near the Pylons (mile-long structures of unknown origin that can be found in outermost explored regions of the space between the Planes).
Wild magic anyone?
As for the Hobbit, I recall something being mentioned about him on the Blue Room mailing list ages ago but alas, details are fuzzy. I believe it was something of a joke that latter became canon. The poor fellow was living in the Zoo, I kid you not! I assume he must have arrived on Tekumel via some sort of interdimensional means.
I *do* know for a fact that the Hobbit is now dead, having perished due to natural causes (old age? disease? despair?) and his stuffed body can now be found on display on the Governor's musem...or was it the palace?
Btw this is *light-years* beyond the stuff I'm running in my EPT campaign. I'm playing what the professor would call Tekumel 101. The basics that barely scratch the surface of the setting. Even then it sometimes gets pretty elaborate and immersive.
The esteemed Prof. has been doing 301: Advanced Studies with his groups for years.
There must really be some brain-shattering tales waiting to be told out there...