Excerpt from The Power of Form Applied to Geometric Tracery
The Author of this treatise was first in the field to, prove, that not only was the whole detail of Gothic Architecture founded upon geometric law, but that the power of design still remained with us, waiting only for its application. In addressing himself to the learner, for whose especial use his labours here are intended, he does not wish for one moment to question the previous knowledge upon this subject possessed by many practised Architects, who must have travelled over the same ground as himself in searching for the primary elements of their profession. But whatever the knowledge of others may have been upon our present subject, it has not been given to the world, and the Author's claim holds good as the originator of the conjurations embodied here and in other works, and which, like all sleight-of — hand tricks, are very easy. In short everybody can do them — that is, when they know how.
I've read all of the words and have worked a number of the designs out with compass and ruler. (Fun in a nerdy way.) While 100 possible tracery designs are shown, the actual mathematical layouts are not always sufficiently described.