When and where can this textile be found?
- 3/1 lozenge twill is only occasionally found, such
as in a 13th century linen mitre.
A ribbed twill (rippenkoper) is produced when rows of a weft-faced twill are alternated with rows of a warp-faced twill. This difference produces a ribbed effect.
 A Matter of Material: Changes in Textiles from Roman Sites in Egypt’s Eastern Desert by Lise Bender Jorgensen (in An Tard)
In 3/1 twill the weft goes under three warp threads, then over one, creating a very warp-faced twill. 1/3 twill is the reverse.
 ‘The Apparel oft Proclaims the Man’: Late Sixteenth- and Early Seventeenth-Century Textiles from Bridge Street Upper, Dublin by Elizabeth Wincott Beckett (in NESAT VII)