The website that previously hosted this has dropped all of my old patterns. They are currently unavailable, but I may reissue them at another time.

“Tetrad” is a term that, loosely, means, “four.” It
pops up in Physics, geometry, music,
chromosomes and a few other areas.

The charts are a bit strange, since the stitch
pattern didn’t really line up with the rate of
increase, but I think I’ve made it fairly elegant.
They are all designed to fit on standard, letter sized
paper.

All of the motifs in the shawl are mirror-imaged,
which fits, since we are mirror-image twins.

ERRATA
The very first row of the charts for sections 6 and 7 are wrong. They should have one last stitch at the end of each row.