Cemalettin Server Revnakoğlu, who conducted important research on the history ofIstanbul dervish lodges and tariqas, also created a large archive consisting of manydocuments and items related to the subject. Many documents about Bektashismin his archive are disorganized and not published. The scope of this study includesBaba İbrahim, Baba Hasan Basri, Baba Tevfik, Ali Fethi Beybaba, and Ali Bey— Bektashi fathers whose biographies have been compiled by Revnakoğlu. His notesalso addressed Bektashi aspects in the sheikhs and dervish lodges of Rifa‘iyya,Celvetiyya, Khalwatiyya, Mevleviyya, Ussakiyya, and Naqshibandiyya-Khalidiyyatariqas; specifically, he mentioned Baba Ziya, who was the sheikh of Üsküdar Rifa‘iDervish Lodge, and Molla Bey, from Kubbeli Dervish Lodge in Rifa‘iyya; Baba Haşimin Celvetiyya, Dede Ramiz in Khalwatiyya, Abdülvahid Çelebi in Mevleviyya, BabaEmin from Yedikule Ussaki Dervish Lodge and his caliph Fahreddin Himmeti Efendiin Ussakiyya, and Sheikh Mustafa Efendi in Naqshibandiyya-Khalidiyya. Revnakoğlu,who had a special interest in Sufism, met many sheikhs and visited most of the dervishlodges and zawiyas due to both his duties and special interest. His father, Mr. Server,who fed off Baba Nafi (sheikh of Rumelihisarı Bektashi Dervish Lodge) also helpedRevnakoğlu establish close relations with the Sufi community. As a result, he conveyedhis own observations and the testimonies of the people around him in his writings.