First article in a series on twills from Master Weaver, dealing with 'high' twills woven on more than four shafts. It explains the rules for dividing a twill repeat into floats, listing the distinct six-shaft twills (1:5, 2:4, 3:3, 1:1:1:3, 1:1:2:2) and excluding repeats or reverses of smaller twills. It then gives rules for designing symmetrical pattern twills (threading, treadling, tie-up diagonal) and discusses which twills can be woven 'as drawn in' symmetrically, illustrated with diagrams in Figs. 1-3.