Louis Duchesne thought that the Gallican Collects were also introduced by the word "Oremus" ("Origines du Culte", Paris, 1898, 103).
In his work "Origines du Culte," published in 1898, Louis Duchesne suggested that the Gallican Collects were introduced with the word "Oremus" and elaborated on this idea in his study found on page 103 of Paris.