The card game Avilude or Game of Birds was produced by the West & Lee Game Company of Worcester, Massachusetts, around 1873. A matching game similar to Authors, Avilude differs in several key ways. Instead of a knowledge of authors and their works, or geography or history, Avilude simply uses types of birds. But related cards, or "books" include eight cards instead of the usual four. Players choose to lay a pair, or two pair, within the book, down at a time. The more cards they lay down by holding them, the more points they gain. All is governed by timing and players can only make one such move once during their turn, so strategy is involved. Noyes & Snow, the business successors to West & Lee, continued to publish the successful Avilude for some time.