Churchill appeared to accept this theory in his memoirs, although he is extremely critical of the poor German intelligence that led to the disaster. He wrote, "The brutality of the Germans was only matched by the stupidity of their agents. It is difficult to understand how anyone could imagine that with all the resources of Great Britain at my disposal I should have booked a passage in an unarmed and unescorted plane from Lisbon and flown home in broad daylight." As it was, Churchill travelled back to Britain via Gibraltar, departing on the evening of 4 June 1943 in a converted Consolidated B-24 Liberator transport and arriving in Britain the next morning.