April 1956 issue of the Shuttle Craft Guild Handweaver's Bulletin (Portfolio edition), written by Harriet Tidball, completing a three-month series on the Double Twill technique of the Unit Weave Class. It presents a Technique Variation Chart and index of double twill variations, four-harness double twills woven as weft stripes, Mary Atwater's four-harness false-damask pick-up method, double jeans twill, eight-harness double twill and false damask, an upholstery fabric in double twill, double twill on opposites, and double damask. Practical sections cover warping and beaming linen damask warps, selvages, and washing linens, followed by Threadbender notes on publications and courses.