The books of the confraternities are divisible into two classes--necrologies and _libri vitae_. The former are in the shape of a calendar, in which the names are arranged according to the days on which the deaths took place; the latter include the names of the living as well as the dead, and were laid on the altar to aid the memory of the priest during mass. Twice a day--at the chapter after prime and at mass--the monks assembled to listen to the recitation of the names, singly or collectively, from the sacramentary, diptych, or book of life. The most famous English _liber vitae_--that of Durham--embraces entries dating from the time of Edwin, King of Northumbria (616-633), and was compiled, apparently, between the devastation of Lindisfarne in 793 and the withdrawal of the monks from the island in 875. In the first handwriting there are 3,100 names, a goodly proportion of them belonging to the seventh century. As has been already implied, various degrees are represented in the rolls of the living and the dead--notably, of course, benefactors, but recorded in them are bishops and abbots, princes and nobles, monks and laymen, and often enough this is their only footprint on the sands of time. The name of a pilgrim in the confraternity book of any abbey signifies that he was there on the day mentioned. ECCLESIASTICAL CHAPTER II VOWESSES Not wholly aloof from the subject treated in the previous chapter is the custom that prevailed in the Middle Ages for widows to assume vows of chastity. The present topic might possibly have been reserved for the pages devoted to domestic customs, but the recognition accorded by the Church to a state which was neither conventual nor lay, but partook of both conditions in equal measure, decides its position in the economy of the work. We must deal with it here.