Had to purchase, of course. The skein I bought weighed 136 grams; it is probably worsted weight. The young woman in the shop assured me it is “sheep wool.” The yarn decided it needed to be a multidirectional scarf, specifically this version.
I used US8 needles and ended up with a scarf 5 inches wide and 86 inches long. It is a warm scarf. Every time I wear it I will think of the very hot day in Buenos Aires when I bought the yarn.