Life's funny. Here I am thinking it's been a while since I've read a good Knights Templar/Holy Grail story, and then I click on the Guardian Web site, and lo and behold!

An excerpt:

One of the problems with secret societies - especially the kind whose members exert a shadowy influence on the course of world events - is that they can be a bit difficult to track down. Never was this more true than of the Knights Templar, the ancient Catholic order rumoured, among other things, to know the whereabouts of the Holy Grail. Officially, the Templars don't exist, having been driven underground by the pope more than 600 years ago; in The Da Vinci Code, they are described as inhabiting "a precarious world where fact, lore and misinformation had become so intertwined that extracting a pristine truth was almost impossible". Nobody even seems to agree on what the Holy Grail is: some say it is the cup used by Jesus at the Last Supper; others that it was used to collect his blood at the crucifixion. Needless to say, the Templars haven't been too eager to clarify any of this publicly.

Then, late last year, the group apparently made an unprecedented communication with the outside world. It emerged that the Templars were demanding an official apology from the Vatican, for having persecuted them in the 14th century - and that the Vatican was giving "serious consideration" to the matter. The demand came in a letter, signed on behalf of the grand master of the Templars. And for the conspiracy theorists who have pursued the knights for centuries, it was accompanied by a tantalising clue: an address. In Hertford.

If there is something implausible in the idea that huge stretches of world history have been secretly coordinated from a market town just north of the M25 - well, maybe that's what they want you to think. The local newspaper, the Hertfordshire Mercury, certainly seems convinced: over the past few months it has published several intriguing stories quoting local Templars, who told its reporter of a secret network of tunnels under the town that was still in use by the order. "It reaches beyond well known central Hertford locations," one Templar said, "including the tourist office, the castle, Monsoon, Threshers, the post office, Bayley Hall, and the council offices." Treasures of "immense importance" were hidden there, it was claimed. Was the quest for the Holy Grail finally about to come to an end? More surprisingly still, was it about to come to an end underneath Monsoon on Market Place?