Talk:hide nor hair
The grammatically correct expression is "neither hide nor hair". The example presented is syntactically incorrect. The Twain quotation is grammatically wrong, but that's colloquial speech and is certainly intentional.
WRONG: He retired last June, and none of his coworkers have seen hide nor hair of him since.
RIGHT: He retired last June, and his coworkers have seen neither hide nor hair of him since.