[11] The earliest known edition of the _Celestina_ is believed to be represented by an unique copy which was once in Heber's collection. The colophon of this volume is dated Burgos 1499; but there is some doubt concerning the date inasmuch as the last page has been recently inserted and may not be a faithful reproduction of the original printer's mark. It is, however, tolerably certain that this edition came from the press of Fadrique de Basilea (Friedrich Biel): for whom, see Conrad Haebler's _Typographie Ibérique du quinzième siècle_ (La Haye and Leipzig, 1901), pp. 30-32. It is also fairly certain that this Heber copy, whatever its exact date may be, is earlier than the Seville edition of 1501, reprinted (1900) by M. Raymond Foulché-Delbosc in his _Bibliotheca Hispanica_. Finally, the probability is that the edition which survives in the Heber volume was preceded by another edition of which no trace remains: see M. Foulché-Delbosc's remarkable _Observations sur la Célestine_ in the _Revue hispanique_ (Paris, 1900), vol. vii., pp. 28-80. [12] The earliest known edition of _Amadís de Gaula_ (Zaragoza, 1508) is believed to exist in an unique copy in the British Museum, press-marked as C. 57. g. 6. But there is reason to think that there was a previous edition which has disappeared. [13] There are three distinct editions of _Lazarillo de Tormes_ all dated 1554. They were published respectively at Alcalá de Henares, Burgos, and Antwerp, and--so M. Foulché-Delbosc inclines to believe--in the order here given: see his _Remarques sur Lazarille de Tormes_ in the _Revue hispanique_ (Paris, 1900). vol. vii., pp. 81-97. M. Foulché-Delbosc argues with great ingenuity that these three editions of 1554 derive from another edition (printed before February 26, 1554) of which no copy has as yet been found. [14] Sr. D. Francisco Rodríguez Marín mentions that a copy of the _princeps_ of the _Primera Parte de Guzmán de Alfarache_ (Madrid, 1599) existed in the library of the Marqués de Jerez de Caballeros, recently acquired by Mr. Archer M. Huntington: see Rodríguez Marín's _El Loaysa de "El Celoso Extremeño"_ (Sevilla, 1901), p. 283, _n._ 102. Another copy of this rare edition is in the British Museum Library. [15] Rius (_op. cit._, vol. i., p. 4) mentions eight copies of the _princeps_ of _Don Quixote_ (Madrid, 1605), and it is certain that there are other copies in existence.