SCHMIDT 2017, 31 underlines that the three concordances of this cycle transmit it following Compère's cycle C44 In nomine Iesu / Officium de cruce, also linked to the Holy Week. According to him, the two cycles are stylistically similar and Compère's authorship of the cycle Popule meus has to be considered seriously.
Only the motet Ave virgo gloriosa Maria mater gratiae is clearly attributed to Compère in a concordant source (I-Rvat CS 46). For the attribution of the Sanctus see M281.
According to WARD 1986, 506, Sanctus and Ave virgo gloriosa Maria mater gratiae are parts of a five-pieces cycle, whose components are dispersed in the four Libroni. In WARD’s hypothetical cycle, however, the motet O genitrix gloriosaM292 is placed between the Sanctus and Ave virgo gloriosa Maria mater gratiae.
The first part (Sanctus) has also been copied In I-Mfd [4], ff. 66v-67r, where a G has been added at the end of each voice, except in the Altus. Consequently, the final in I-Mfd [4] (G) differs from the final in I-Mfd 2 (D).
For the attribution of this piece to Compère and its possible belonging to a cycle, see WARD 1986, 499, 506, and 508-515. The attribution was proposed by STAEHELIN 1973, 82, based on the probable identification of this Sanctus with the isolated one attributed to “Loyset” in I-Mfd [4] according to BERWIN-HIRSCHFELD 1892, 91. Ludwig Finscher (s.v. “Compère, Loyset”, in MGG Online) strongly questioned the attribution on stylistic grounds. See also C29. Due to the complex issues of authorship and rewriting and the web of partial and reworked concordances regarding the entire cycle as proposed by WARD 1986, the problem awaits further investigation.
