The Usus Conversorum, was drawn up by Stephen Harding,
probably in the early 1120s, and was used until the early thirteenth
century as a reference work to establish uniformity of practice,
Waddell, Usages, pp. 20-1. It is a thorough document and
provides us with a clear insight to the daily life of the Cistercian
lay-brothers, as it should have been practiced. The Usages
has recently been edited and translated by Chrysologus Waddell,
Cistercian Lay Brothers: Twelfth-century Usages with Related
Texts (Brecht, 2000).