Section D (Tubular Weaving) of a series on double weaves by Paul O'Connor. It explains how joining both selvages of a double weave makes a tube, why an odd number of warp threads is needed, and which treadling sequences work (1; 134; 3; 123). A table compares treadling for separate layers, double width cloth and tubular weaving. It also gives instructions for pillow covers, small purses or glasses cases, pockets stuffed on the loom, and caps or dolls, and cites examples from Shuttle Spindle and Dyepot.