A concept invented (or discovered) by a Scottish engineer named Alexander Thom (1894–1985). By measuring numerous megalithic sites, he came to the conclusion that there was a standard of measurement, used anciently, throughout Great Britain. He called this measurement, precisely 0.82966 meters in length, a megalithic yard.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...