1. Zorzo (or Zorsi) Dolphin (or Zorsi Dolfin), ‘Assedio e presa di Constantinopoli nell’ anno 1453.’ This is mainly a translation from Leonard, but the author claims to have added what he heard from other eye-witnesses of the siege. It was published by G. M. Thomas in the ‘Sitzungsberichte’ of the Bavarian Academy in 1868. Another version is given by Dethier in his collection of documents relating to the siege, a collection which I refer to simply as Dethier’s ‘Siege.’ 2. ‘Rapporto del Superiore dei Franciscani presente all’ assedio e alla presa di Constantinopoli.’ This report was made immediately after the siege and has long been published, but apparently was not known to Gibbon. Dethier also published it in his ‘Siege.’ 3. ‘Epistola Ang. Johannis Zacchariae,’ Podestà of Pera, written within a month of the capture of the city, was first published in 1827. The version revised by Edward Hopf and Dr. Dethier is the one used by me. 4. Montaldo’s ‘De Constantinopolitano excidio’ is reproduced in Dethier’s ‘Siege,’ and contains useful hints by an eye-witness. 5. Christoforo Riccherio, ‘La Presa de Constantinopoli,’ first published in Sansovino’s ‘Dell’ Historia Universale,’ was republished with notes in Dethier’s ‘Siege,’ and is a valuable and brightly written narrative. 6. Θρῆνος τῆς Κωνσταντινουπόλεως, was first published by Ellisen in ‘Analekten,’ Leipzig, 1857. If the author was in Constantinople during the siege, he has not given a single item of information which is of value to the historian. His long wail is curious and interesting, but otherwise useless. 7. The Θρῆνος of Hierax the Grand Logothetes, or ‘History of the Turkish Empire,’ though only written near the end of the sixteenth century, has valuable topographical hints. It was translated by H. E. Aristarchi Bey, the present Grand Logothetes, from a MS. existing in the Monastery of the Holy Sepulchre at the Phanar, and edited by Dethier. 8. ‘Libro d’ Andrea Cambini Florentino della Origine de’ Turchi et Imperio delli Ottomanni.’ I am not aware whether this has been published at a later date than the copy in my possession, which was printed in Florence in 1529. It was then published by the son of the writer, and Book II., which treats of the siege, suggests that the author has gained his information from spectators of the siege. It contains many useful statements. 9. ‘A Slavic Account of the Siege,’ published by Streznevski, is judged by Monsieur Mijatovich, on account of its peculiar idioms, to have been written by a Serbian or Bulgarian. He speaks of it as the ‘Slavonic Chronicle.’ A translation and a slightly different version was published by Dethier as the ‘Muscovite Chronicle.’ Though the narrative has been largely added to by subsequent hands, there is reason to believe that it was written by an eye-witness of the siege.