A March 1947 issue of Handweaving News by Nellie Sargent Johnson explaining how to design crackle (Jamtlandsvav) threading and key drafts following twill order of pattern blocks 1-2-3-4. It covers key drafts, overlapping two-thread-spaced pattern blocks, check drafts, a short notation using repeat multipliers, and variations such as unequal block sizes and reversing at a center. It closes with an experimental sampler plan for a 240-thread warp of 20/2 cotton with a heddle count table.