Author
Muhammad Jamal al-Din bin Sayyid Saffar al-Husseini al-Asdaq Abadi (1838–1897), an Islamic ideologue, thinker, and political activist, is considered one of the founders of the Islamic modernist movement and a proponent of Islamic unity in the 19th century. He traveled throughout the Muslim world and cities in Europe such as London and Paris, and finally settled in Istanbul (then known as Istanbul, now referred to as Istanbul), where he died.
Source: Wikipedia