23:51:53
The inscription was made between 1877 (book print date) and 1882 (passing of R. Hayyim Sofer who is refered to as living.)
The works of R. Isaac Eizik include: Likkutei Maharia (1890), on Yalkut Shimoni; Likkutei Torah ve-ha-Shas (1886). M. Braver's Pe'er Yizhak (1928) treats of his life and work. The entire Zhidachov dynasty is covered in I. Craker's Eser Kedushot (1906), and R. Mahler's Ha-Hasidut ve-ha-Haskalah (1961), which contains an index.