As Studer notes in his edition of the Port Books, “Andrew Spinol pledges for Jacob Spinol 26 bales of fells, contents 6500 fells of passelarge ... and 6500 lamb-skins. Note that duty on fells passelarge was twice that on the ordinary lamb-skin; it must therefore have been a particularly large fell, or a fell with a superior quality of wool. M. Paul Meyer has kindly pointed out to me that passelarge is a superlative adjective, a parallel form of très large = very large. Passe fin occurs in Cotgrave, passe gracieus in a notice of M. Meyer, published in Bulletin des anciens textes fr., 1912, No. 1, p. 61.” The term is also attested once in an English context in Mercers ii 684: Lamfell for the C. [...] Passelarge for the C."