The _Ave Maria_ is supposed by Koch to belong to the thirteenth century and some have ascribed it to Adam of St. Victor. It is, perhaps, by Heribert of Eichstettin (died 1042). Hermann wrote the _Ave praeclara maris stella_, which might have been mistaken for this other.
The _Salve regina_ is assigned by Durand to Peter of Compostella. Gerbert names several possible authors, but evidently follows the leadership of Durand. (_De Cantu, etc._, II., 27.) And yet Trithemius, with every really critical scholar, credits it to Hermann. It is exhaustively considered by Wegelin and definitely conceded to him. (_Thes. Rerum Suevicarum_, II., p. 120 _ff._)
Robert the Second cannot claim the _Chorus novae Hierusalem_. It is the production of Fulbert of Chartres (died 1029), and is included without question in every complete edition of his works.
Thus the absolute authority of Durand is much shaken. He was a lawyer in the thirteenth century, who studied at Bologna and taught at Modena; a legate of Pope Martin IV.; dean of the church at Chartres, and Bishop of Mende. The fact that he was dean of Chartres, and yet ascribes the _Chorus Novae_, not to Fulbert but to Hermannus, is suggestive, but not convincing.
So Durand was the first person to affix the name of Robert II. to the _Veni Sancte_. Trithemius comes next in order; the Abbot of Spanheim; historian and scholar; indefatigable in researches, but erratic and prejudiced; born 1462 and dying 1516. His true name is Johann von Trittenheim and we derive this, and other information about authors and their works, from his _Liber de Scriptoribus Ecclesiasticis_—a biographical dictionary like those of Jerome, Gennadius, and Isidore, to whose works he really furnishes an Appendix. Egon (sometimes known as Ego) in his account of Reichenau’s distinguished men (_De Viris illustribus Augiae divitis_, quoted by Pez: _Thesaurus Anecdotorum_, I., 3; 68. Cf. Migne, 143) declares that Trithemius was “unjustly hostile to the monks of Reichenau” in asserting that “our Hermannus” was from St. Gall, when even Metzler conceded, on behalf of his own convent, that Hermann had changed his residence from St. Gall to Reichenau. Be this as it may, the positive statement of Trithemius, which gives the _Veni Sancte_ to Robert II. instead of to Hermann, has been generally accepted. Cardinal Bona (1677), Louis Archon (1704-11), and others agree with him.