To turn to the treatises on special portions of the subject. The point which has been most discussed in recent years is the question of the stage. The following are among the more important articles which have been written in favour of Dörpfeld’s views:—White, _The Stage in Aristophanes_ (_Harvard Studies_, ii. pp. 159-205); Bodensteiner, _Scenische Fragen im griechischen Drama_ (Leipzig, 1893); Capps, _The Chorus in the later Greek Drama_ (_American Journal of Archaeology_, x. 3. pp. 287-325), _The Stage in the Greek Theatre_ (New Haven, 1891), _Vitruvius and the Greek Stage_ (_Studies in Classical Philology_, Chicago, 1893, p. 3 ff). The opposite side of the question has been defended by Todt, _Noch einmal die Bühne des Aeschylos_ (_Philologus_, 1889, p. 505 ff.); Curtius, _Orchestra und Bühne_ (_Berliner Philolog. Wochenschrift_, 1893, p. 97 ff.); Prof. E. Gardner, _A Plea for Vitruvius_ (_Supplementary Papers of the Hellenic Journal_, 1892, p. 92 ff.); Lechat, _Épidaure_ (Paris, 1895, p. 215 ff.); Zacher, _Die erhöhte Bühne bei Aristophanes_ (_Philologus_, 1896, p. 181 ff.); Chamonard, _Bulletin de Corr. Hellénique_, 1896, p. 294 ff. (an admirable criticism); and also in various reviews of Dörpfeld’s book, and especially by Bethe (_Göttingische gelehrte Anzeigen_, 1897, pp. 701-28), and by A. Müller (_Berl. Philolog. Wochenschrift_, 1897, pp. 1121-31). Special views, which may be regarded as a sort of compromise between the ordinary theory and that of Dörpfeld, are advocated by Weismann in _Die scenische Aufführung der griechischen Dramen_ (München, 1893), _Zur Thymele-frage_ (_Jahrb. für classische Philologie_, 1895, pp. 673-9), _Scenische Anweisungen, &c._ (Bamberg, 1896); and by Christ in _Jahrb. für classische Philologie_, 1894, p. 27 ff., p. 157 ff., and _Sitzungsberichte der bayer. Akad. der Wissenschaften_, 1894, pp. 1-52. All these articles, together with others which might be mentioned, have been of great service in the preparation of the present edition. Opinions may differ as to the soundness of the views which they respectively advocate. But there can be no doubt that this exhaustive discussion of the subject has brought to light many new facts, and cleared up many difficulties.