He also delves deeply into speculation about the Bible's mysteries. For example, in the note to Genesis 2:8 he states the following regarding the size of the Garden of Eden: " How great might be its extent we do not know. If the sources of the Ganges, Nile, Tigris, and Euphrates, be not now changed, and if these be the rivers which sprung from the fountains of Paradise, (both of which points are undecided), the garden must have comprised a great part of the world." Annotations to the New Testament are in a similar vein, but were not compiled by Haydock. Given the enormous scope of annotating the entire Bible, he was unable to maintain the demanding production schedule in addition to his pastoral duties at Ugthorpe. Therefore, another Douay alumnus, Father Benedict Rayment (1764–1842), was called on for assistance. He and a group of colleagues compiled the New Testament portion of the commentary. There was contemporary criticism that haste in preparation of the commentary resulted in some errors. However, given the spartan resources available for Catholic publishing in England at the time, the Haydock Bible must be considered a remarkable achievement.