The book took 18 years to complete and the acknowledgments cover two full pages - a testimony to the thoroughness of Halpenny's research. Among the many firms and names mentioned, one in particular comes in for special mention. W/Cdr. K H Wallis, who saved the life of the Canberra by inventing the system of loading bombs for as late at 1951 at R.A.F. Binbrook, not a single aircraft was capable of delivering bombs, simply because the fuselage was too low to the ground!
