Mareh Mekomos with notes from R' Berkovits in Lashon Hakodesh. Includes mitzvos/sugyos of: Sechiras Poalim, Chazaras Hapoel, Bitul Machmas Oness, Pe'ulas Shachir, Yored Benichsei Chaveiro, Tivuch Veshadchanus, Mavriach Ari, Kinyanei Shemirah, Kabalas Shemira, Chazaras Hashomer, Chiyuvei Shemirah, Chiyuvei Hashomrim, Shomer Shemasar Leshomer and Piturei Shomrim.