numbers of the 1553 edition in the Greek text which faces his English translation, stating "My collations have been made against Camerarius' second edition, because thus far this has been the standard text and it was most convenient". Also in 1940, a Greek critical edition was published by Teubner, in Germany, based on the unpublished work of Franz Boll which was completed by his student Emilie Boer. Robbins expressed regret at not being able to refer to this in the preparation of his English translation. In 1994 the 'Boll-Boer' edition became the basis of a serialised English translation by Robert Schmidt, published by Project Hindsight. The 'Translator's Preface' was critical of Robbins' understanding of some of the "conceptual issues involved" and argued the need for a new English translation which recognised the "probable superiority of the Teubner text edited by Boll and Boer in 1940". The most recent critical edition of the Greek text was made by the German scholar Professor Wolfgang Hübner, and published by Teubner in 1998. Based on 33 complete and 14 partial manuscripts, Hübner also incorporated the unpublished notes of Boer and the reasoning given in the Robbins and Boll-Boer editions. This is now considered the authoritative edition. A reviewer's comment in The Classical Review declares of it "Progress over previous editions is evident on virtually every page". Associated texts Commentary In addition to the Arabic commentary on the Tetrabiblos made by Ali ibn Ridwan (Haly) in the 11th century, significant attention is given to an anonymous Greek Commentary, which has older, obscure origins. It was written at an uncertain date, in either late antiquity or the Byzantine period. This is also attributed to Proclus, as the presumed author of the Paraphrase, although Heilen has remarked that such an attribution "looks like guesswork". Houlding has also pointed out that differences in tabulated information presented within the Paraphrase and the Commentary "is a telling argument that both cannot be the work of the same author". The Greek Commentary was first printed in 1559 with an accompanying Latin translation by Hieronymus Wolf. This claimed to be based on a heavily corrupted manuscript which required numerous conjectures by a scholarly friend of Wolf, who preferred to remain anonymous rather than face reproaches for "dabbling in this sort of literature". Wolf's edition was bound with an Introduction to the Tetrabiblos, attributed (speculatively) to Porphyry, and the scholia of Demophilus. The