The account describes the demon throwing sand over the triangle to breach it, following which it attacked Neuburg 'in the form of a naked savage', forcing him to drive it back at the point of a dagger. Crowley's account has been criticized as unreliable, as the relevant original pages are torn from the notebook in which the account was written. This, along with other inconsistencies in the manuscript, has led to speculation that Crowley embroidered the event to support his own belief system. Crowley himself claimed, in a footnote to the account in Liber 418, that "(t)he greatest precautions were taken at the time, and have since been yet further fortified, to keep silence concerning the rite of evocation." Arthur Calder-Marshall, meanwhile, asserts in "The Magic of my Youth" that Neuburg gave a quite different account of the event, claiming that he and Crowley evoked the spirit of "a foreman builder from Ur of the Chaldees", who chose to call himself "P.472". The conversation begins when two British students ask Neuburg about a version of the story in which Crowley turned him into a zebra and sold him to a zoo. Neuburg's response in this book contradicts both the words attributed to him in Liber 418 and the statement of Crowley biographer Lawrence Sutin.