by W. G. McLean and E. W. Nelson. by H. J. Emeleus and J. S. Anderson. [by] A. Nelson and K. D. Nelson. by I. F. Henderson and W. D. Henderson. by J. R. Green and D. Margerison. [by] D. E. Stevenson and A. A. Wilson. by A. G. Martin and F. W. Stephenson. by H.J. Emel鈋us and J.S. Anderson. by E. T. Whittaker and G. N. Watson. by F. A. Benson and D. Harrison.