George Leo Haydock, on Exod 25:4

“Violet and purple, and scarlet twice dyed, and fine linen, and goats’ hair,”

“Scarlet twice dyed. Aquila and Symmachus have transparent. This colour is often confounded with purple, as our Saviour’s robe is styled scarlet by St. Matthew xxvii. 28, and purple by St. John xix. 2. It was dyed with a worm called shani in Hebrew. (St. Jerome, ep. ad Fabiol.) — Fine linen, byssus. Hebrew shésh, “of six folds,” or it may mean cotton, which was highly esteemed by the ancients; (Arabic version; Herodotus) and it is not probable that Moses would have passed over it unnoticed. (Calmet)”

Imported from an open dataset — not yet checked against the printed edition.