1388--Urban VI sends two armed galleys for the defence of Constantinople, but is unsuccessful in raising crusade. 1391--Boniface IX stirs up trouble between Latin and Greek Christians in the Balkan peninsula. 1398 and 1399--Boniface IX orders crusade to be preached throughout Christendom for the defence of Constantinople. 1399--Boucicaut, the only one to respond, goes to the aid of Constantinople. 1402--Smyrna is lost to Timur. 1403--The strife between rival Popes, Benedict XIII and Boniface IX, makes impossible a papal effort to take advantage of the civil strife between the sons of Bayezid, after Timur’s abandonment of his conquests in Asia Minor. BIBLIOGRAPHY I. CLASSIFIED BIBLIOGRAPHY NOTE The Classified Bibliography contains only the names of authors. Following the classification, the books and editions are given in detail under the authors’ names in alphabetical order. I shall be grateful for corrections and amplifications. The work on this bibliography has been done largely in the Bibliothèque Nationale, Paris, and I have been handicapped by the lack of a complete catalogue. No attempt whatever has been made to follow a definite system of spelling of Oriental and Slavic names, for arbitrary changes in spelling on my part would confuse the reader who desires to find in a library catalogue the authors given. I have retained the spelling (except in rare instances where there were divergencies in different editions of the same book) of the author’s name as given by himself or by his editor or publisher. As far as the letter ‘G’, I have made the spelling conform to that of the General Catalogue of the Bibliothèque Nationale. Beyond ‘G’, there is, as yet, no norm. =Bibliographers of Printed Books.= Apponyi; Auboyneau; Boecler; Chevalier; Dherbelot de Molainville; Eichhorn; Fabricius; Fevret; Fitzclarence; Fraehn; Franke; Hadji Khalfa; Halle; Houtsma et al.; Oesterly; Omont; Pogodin; Potthast; Welter; Zenker. =Bibliographers of Oriental MSS.= Ahlwardt; Ali Hilmi; Apponyi; Auboyneau; Blochet; Browne; Cusa; De Goeje; De Jong; Derenbourg; Dorn; Dozy; Fevret; Flügel; Hadji Khalfa; Karamianz; Lampros; Pertsch; Rieu; Rosen; Schéfer; Slane; Smirnow; Sprenger; Welter. =Numismatists.= Blau; Djevdet; Engel; Friedländer; Ghalib; Karabacek; Lane-Poole; Lavoix; Makrisi; Pinder; Schlumberger; Serrure; Stickel. =Chronographers.= Aladdin Ali; Arabantinos; Assemanus; Hadji Khalfa; Knaus; Loeb; Mas Latrie; Mullach; Müller; Muralt; Rasmussen; Strzygowski; Wüstenfeld; _Chronicon Breve_ (in Ducas). =Collections of Contemporary Records.= OTTOMAN: Feridun, Collection of. The authenticity of the documents in this collection cannot be definitely established. BYZANTINE: Dieterich; Miklositch; Müller; Predelli; Sathas.