Part IV of a series on practical linen weaving from the Irish Textile Journal of 15 March 1893. It explains how to analyse textile samples onto design paper, then covers three-leaf (drill) and four-leaf twills, with weave plans and drafts (Figs. 1-9). It gives sample warp colour sequences, reed and pick counts for linen shirtings, trouserings, linings and tent fabrics. The scan also includes the end of an editorial on Irish linen and relief industries and trade reports on the making-up trades and the Irish woollen trade.