Jeff...I and Robert have been exchanging pm's about that too.
The problem is I can't find the photos, so I used the link above that shows a few of the hulls I saw the Crab Claw rig.
What I told Robert was that the Portuguese brought back form the Polynesia, as well as from China and Indic Ocean, several types of sails, and including the claw rig.
In fact, the Gaff rig name in Portuguese is "carangueja", which means crab....
See here
There is no knowing where one starts and the other finishes...or who was born first..the egg or the chicken...
I saw that sail here, I can see the written reference everywhere, but no photos...sorry
Go to google and type" CARANGUEJA VELA TRANSLATE"