A short excerpt from Louis Crommelin's 1705 Dublin treatise on linen weaving, reprinted in the Master Weaver's "From the Classics" column. It gives a recipe for the warp dressing (sizing) used in France and Flanders, made from boiled wheat flour paste and fermented with old sour dressing. It also advises that weavers of fine linen work in an underground cellar or similarly damp, close place so the yarn does not break.