[Fedora]

While I was looking up that link on Ogham, I came across a few sites mentioning this--don't know how accurate this is yet, but potentially interesting:

Hindu and Celtic Culture Are One

One of the hallmarks of Celtic culture is the use of the sacred Ogham (pronounced Oh-wum) alphabet by the Druuids, who are Celtic Brahmins. Many scholars believe that Ogham was only used by the Irish, and not by other Celts. However, this is clearly disproved by many Ogham inscriptions appearing in different places, including France, Iberia (Spain and Portugal), the Danube valley, and the Tocharian regioins. Furthermore, inscriptions of Ogham have been found in ancient sites in Japan, some of them megalithic. One Japanese scholar who studies these inscriptions and the sites they are found in believes that the inscriptions indicate that some of the Buddhist monks who brought Buddhism to Japan were Tocharians, or had maintained the use of the sacred writing system of the Tocharians.

[blam]

"One Japanese scholar who studies these inscriptions and the sites they are found in believes that the inscriptions indicate that some of the Buddhist monks who brought Buddhism to Japan were Tocharians, or had maintained the use of the sacred writing system of the Tocharians."

This is not out of line with Victor Mair's thinking.