Peter,

A very interesting read. Thanks.

Mere conjecture on my part, but I wonder if the triple stripes weren't just the decision of a lazy weaver when confronted with the regular 42nd sett: "Alternate 2 and 4 black stripes every other half-sett? Nah, that's too complicated! I'm going to split the difference and simply do 3 black striped on every blue field..."