For an overview of the collection, see French Manuscripts within the Guide to Special Collections.
M. Tyson, ‘Handlist of the collections of French and Italian manuscripts in the John Rylands Library’, Bulletin of the John Rylands Library, 14 (1930), pp. 563–628. (French MS 1-117)
Frank Taylor, Supplementary Hand-list of Western Manuscripts in the John Rylands Library (Manchester: Manchester University Press, 1937). 49 pp. (French MSS 118-129)