http://www.book-of-thoth.com/article1610.html
I’ve recently chanced on an excellent scholarly article, with a deep and intelligent analysis of the possible esoteric origins of some very curious hermetic markings on a Valladolid Cathedral manuscript.
The writer, Professor E.W Vogt of Seattle Pacific University, makes several highly enlightening and original deductions, for example on the connection between the Masonic "Tri-Tau" cross and the IHS emblem, as well as many important observations upon the influence and interrelationship between esoteric schools of thought and arcane societies, and the article is a must-read for any serious aficionado of Medieval alchemy and symbolism.
I feel, however, that the author had misinterpreted the meaning of one of the ink-drawn symbols on the title page of the MS. Yet this apparent "misinterpretation" offers us another fascinating connection with an aspect of "the Holy Grail" story!

Update:
Our newest
Isochronic Recordings use equal intensity tone that pulsate. The frequency
pulsing recordings will instantly put you in an altered state of consciousness
where you can develop spiritual abilities, reach new planes of existence, and
so much more.. This newest technology
will blow your mind. Full information is available at
The Unexplainable Store.
Wondering how it works? We
have a video demonstration of each technology being played through a frequency
spectrum analyzer. You can actually see the wave-forms. You can
Watch
The Video Here.
Make sure to check out each category for a full description of each recording.