A 1956 Master Weaver lesson on Summer & Winter weave and its close relationship to crackle. It explains that the two differ mainly in treadling, then covers tie-ups for 4-frame and multi-block drafts, compound tie-ups for looms with few treadles, and deriving a tie-up from a pattern by analysis. It also describes using S-&-W for 3D weft effects, simplifying traditional drafts by eliminating a block, and imitating damask in linen, with a practical place-mat project and threading profile.