Louis Duchesne thought that the Gallican Collects were also introduced by the word "Oremus" ("Origines du Culte", Paris, 1898, 103).
According to Louis Duchesne, the Gallican Collects were incorporated with the use of the word "Oremus," as stated in his work "Origines du Culte" published in Paris in 1898 on page 103.