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A pattern book of fancy twill drawdowns by Ralph E. Griswold, generated by a cellular automaton program. The patterns are shown as black-and-white thumbnail drawdowns arranged by size, from 6 x 6 up to 70 x 70, each labeled with the number of its downloadable WIF file on handweaving.net. A brief introduction explains the source of the patterns, how the numbers map to WIFs, and the usage terms, and cites two of Griswold's Drawdown Automata papers.