Calcutta was once a village, hence 'Calcutta-Pargana'. The British divided Calcutta into Saheb Para and Bengalitola. Bengalitola information is very little in the history of Calcutta written by the English. In 1978, the work of collecting the historical information of Bengalitola from the newspapers of the time, old calendar documents etc. started through the Calcutta Charcha Kendra. After that work, the work of compiling the data of the register was started but it was not implemented. After nearly five decades, Nilayakumar Saha has completed the work by presenting the valuable information of the old calendar in this book.