Joh. Mayor, in the first book of his "History of Scotland," contends much for the wholesomeness of oaten bread; it was objected to him, then living at Paris, that his countrymen fed on oats and base grain…. And yet Wecker out of Galen calls it horse-meat, and fitter juments than men to feed on.
You know, my friend, he's only some sixteenth cousin to the Horeszkos, the tenth water on the kisiel. Kisiel is a Lithuanian dish, a sort of jelly made of oaten yeast, which is washed with water until all the mealy parts are separated from it: hence the proverb.