Most of the documentary evidence for leprosy in medieval Rouen relates to the leper houses of Mont-aux-Malades and Salle-aux-Puelles, since these were religious institutions that retained their own records, particularly deeds of property, and left their trace in other documents, such as the Register of Eudes Rigaud. A much larger body of material survives for Mont-aux-Malades than for Salle-aux-Puelles. The former has an unusually rich and wellpreserved archive, held at the Archives départementales de Seine-Maritime, Rouen. It consists of at least three hundred medieval charters (see Figure 10 for an example dated 19 June 1247), as well as other documents from the sixteenth to the eighteenth centuries. The twelfth- and thirteenth-century charters are in Latin; from the end of the thirteenth century the documents are increasingly written in French. The great majority of the charters mark donations and sales of Rouen property to Mont-aux-Malades by the city's burgesses in the thirteenth century. Many are confirmed by Rouen's mayors, reflecting the social circles within which the burgesses moved, and making it possible to give an approximate date to undated documents. Mont-aux- Malades’ rededication to St Thomas Becket in about 1174 also makes it possible to date charters that refer to this dedication to about 1174 or later.

Other relevant manuscripts are housed in the ADSM, the Bibliothèque municipale, Rouen, the Archives nationales, Paris and the British Library, London. The ecclesiastical archives in the ADSM (Série G) contain records of the examination of suspected lepers in the sixteenth century. The BM, Rouen, houses the fifteenth-century memorial book of La Madeleine hospital (MS Y42), which sheds light on the unification of Salle-aux-Puelles with La Madeleine in 1366, and on patterns of charitable benefaction at Rouen.

There is no extant cartulary for Mont-aux-Malades or Salle-aux-Puelles, although cartularies survive for several other French leprosaria. However for Mont-aux-Malades the conservation of a large number of charters, many of which bear a label or shelf mark, is indicative of careful record-keeping and a high level of administrative organisation. No books or mentions of books survive for either institution, although both presumably owned books. One set of rules was issued for Mont-aux-Malades by Peter de Collemezzo, archbishop of Rouen in May 1237; twelve years later (August 1249), Eudes Rigaud drew up statutes for Salle-aux-Puelles.