Although I still don't have exact fiber content data, (just that it's "wool"), I was able to ascertain that I purchased it from Ceol-deas on eBay, who specializes in selling Irish yarns & crafts. My best guess is its parentage is a 100% Donegal tweed wool. I snagged 20 skeins, totalling 1360yds, which means I might be shy of the total 1647 called for (DOH!). Judging by the 6 balls remaining, I might just be able to eke it out. No hood, maybe??
And the color, oh the color! It resembles the backs of the new foliage on Cole's meyer lemon tree in the backyard. I think it amusing that my yarn looks & knits identical to the Tahki yarn called for in the pattern, right down to the color. The true color in real-life is somewhere between the two photos here.
And check out these buttons! Three of the variegated and 2 of the solid purple, and some i-cord for toggle-style closures, and I'm in business!