Obj. ID: 35407  Shomer ha-Brit by Shlomo Zalman London, Amsterdam, 1719

The following description was prepared by William Gross:

The night before the Brit was considered a time when the baby was particularly vunerable to the influences of Lilith. Men would remain awake during all those hours for the protection of the child. During that time the custom was to read specil sections from the Jewish canon relating to the Brit. Here they are in printed form, and a manuscript of similar work from Siena is also in the Gross Family Collection.
Joseph Dayan was involved in printing Jewish books for more than 20 years. He often cooperated with Moses Frankfurter, and the two published several works together. Initially Frankfurter assisted Dayan, but then decided to set up his own press. Josephs Dayan continued his printing activities from 1719-1742. Throughout his career he printed some 30 Hebrew works, and three works in Yiddish.