by J.G. Semple and L. Roth. by J.G. Semple and G.T. Kneebone. by J. B. Poole and D. Doyle. by A. Dinsdale and F. Moore. by E.A. Ollard and E.B. Smith. by A. R. Payne and J. R. Scott. by E. A. Ollard and E. B. Smith. by H.A. Treble and G.H. Vallins. by P.W. James and D.L. Hawksworth. by W.F. Markwick and W.A. Smith.