“Improvements in the Efficiency of Roadless Vehicles.” A paper read
before the members of The Institution of Automobile Engineers, by
Colonel P. H. Johnson, C.B.E., D.S.O., December, 1921.
“Multi-Wheel and Track Motor.” A paper read before the members of the
above Institution by Major T. G. Tulloch, March, 1923.
“The Progress of Mechanical Engineering in the Military Service.” A
lecture delivered before the members of The Institution of Mechanical
Engineers, by Major G. le Q. Martel, D.S.O., M.C., January, 1924.
“Transport in Tropical Africa.” A paper read before the members of The
Royal Society of Arts, by Mr. R. H. Brackenbury, February, 1925.
“The Roadless Transport Problem.” A paper read before the members of The
British Association, by Colonel P. H. Johnson, C.B.E., D.S.O., August,
1925.