Ultra had been more carefully considered". For its part, Hut 3 had grown "shy of going beyond its job of amending and explaining German messages", believing that "drawing broad conclusions was for the intelligence staff at SHAEF, who had information from all sources", including aerial reconnaissance. E. J. N. Rose, head Air Adviser in Hut 3, read the paper at the time and described it in 1998 as "an extremely good report" that "showed the failure of intelligence at SHAEF and at the Air Ministry". The report is not known to have survived. It was probably the "Top Secret [intelligence] digest", a post-mortem on that failure, referred to by General Strong (1968), "both record-copies of which were destroyed". Lucas and Calvocoressi "expected heads to roll at Eisenhower's HQ, but they did no more than wobble". The most "exciting" work he did at Bletchley Park, he recalled, was handling operational signals on Axis convoys to North Africa from July 1941 and deducing convoys' routes using decrypts, maps, pins and pieces of string. The high standards of accuracy and clarity that prevailed in Hut 3, his chief maintained, were "largely due to [Lucas's] being such a stickler" for them. In out-of-hut hours Major Lucas was Officer Commanding the Bletchley Park Home Guard, a "rabble of egg-heads" that he turned, contrary to stereotype, into an efficient unit that outwitted the local regular forces in military exercises. He also arranged the digging of defence positions "to give the code-breakers time to destroy their papers" should Bletchley Park come under attack. From June 1945 to the end of the War he was head of the Hut 3 History Section, compiling a 'History of Hut 3', now documents HW3/119 and HW3/120 in the National Archives. He was awarded the OBE in 1946 for his wartime work. Demographics In later years Lucas took up the cause of population-control, "a problem not talked about nearly enough", discussing the dangers of world overpopulation in The Greatest Problem (1960). Having laid out the statistics to 1959 and future projections, he argued that the "reckless proliferation" of homo sapiens, as well as impoverishing the world by environmental damage and species-extinctions, would be damaging to the individual and to society: "The finest human qualities are endangered, because the size of populations increases, and ought to be diminished; the size of states increases, and ought to be diminished; the size of cities increases,