I'm knitting the outer shell of this pair from Jamieson's 2-ply Jumper weight. And the colorway is in debt to my friend, who came with me to the knitting shop, found a copy of Ann Feitelson's The Art of Fair-Isle Knitting, and sat with me on the floor, hunting through what seemed like hundreds of tiny skeins until we found those that matched Feitleson's extremely helpful illustrations of different approaches to color. Unlike other books, she uses actual yarn swatches to illustrate how complementary or analogous colors work together; you choose the swatch and then try to find yarn that echoes her choices.
If anyone knows of a source for those mitten clips that one used to use to attach mittens right to the coat sleeve (maybe they disappeared with 50s tv shows and aprons), please let me know. Otherwise, I'll be hunting them up on the Internet. And if you see my missing mitten, please send it home.