An article from the Master Weaver explaining crackle weave on four harness frames, comparing it with overshot and summer-and-winter. It covers the four threading units, the incidental heddles needed between blocks, and three basic treadling methods (traditional, summer-and-winter style, and woven as drawn in). It also gives a tie-up for upholstery fabric with long floats on one side, hit-and-miss treadling experiments, and a project for an upholstery fabric in linen with full threading and treadling directions.