Allison Gaw finished writing this detailed analyses of the writers' hands in 1 Henry VI while living in Southern California the same year that Leslie Hotson, living in England, discovered the suspicious Coroner's Inquest Report of Christopher Marlowe's death. It is not likely Dr. Gaw knew about the discovery until after his book had been published.
From A.D. Wraight's Christopher Marlowe and Edward Alleyn, in which Chapter VIII explores Gaw's thesis:
"As will be seen in the Table of Authorship and Scene-Division, the part allocated to Author A. starts with its powerful opening scene, which marks A. as the main plotter of the whole play. Dr. Gaw comments:
'The opening scene of 1 Henry VI is a studied preparation for the various elements in the ensuing play, combining with the outbreak of the Gloucester-Winchester dispute a vivid relation of the capture by the French of the heroic Talbot, together with an adroit hint foreshadowing the sorcery of Joan of Arc. It shows a realization of the power of detailed climax found, I believe, nowhere as in Marlowe among the pre-Shakespeareans. . . . Thus Marlowe's hand is immediately detectable in A. as the chief dramatist."