In 2019, during the restoration work on the pavilion near the Ahmad Ibn Tawlon mosque in Sidiya Zainab district, a diary was discovered. This diary dates back to the year 1865. It was stored behind the wall of room number seven on the third floor of the pavilion building. The diary is well-preserved. This diary consists of 34 to 53 entries, without any deletions or revisions. It is the only diary that can be published today. It was written by Sulayman Afandi al-Siwfi, who worked as an investigator at the time of the establishment of the police force. He was tasked with investigating the mysterious death of a high-ranking official. Using his expertise in analyzing crime scenes, he discovered that the death was actually a murder, and that the perpetrator left a reminder for the victim. However, he soon realized that this crime was just the first in a series of assassinations. Without any effort, he realized that this would lead to his own downfall.