COOPER AND WILSON PAPERS. Vols. VII, VIII. Correspondence of W. J. Cooper relating to the Indo-European Telegraph Company; 1924-1928 n.d. Partly signed, copies and cipher.
Vol. VII. (ff. 129). 1924-1927. Trade and Commerce: William John Cooper, of the Indo-European Telegraph Company: Business correspondence of William John Cooper: 1903-1928, n.d.: Partly Fr., Germ., Russ. and Persian.: Partly signed, copies and cipher.
Vol.VIII. (ff. 155). 1928 n.d. Trade and Commerce: William John Cooper, of the Indo-European Telegraph Company: Business correspondence of William John Cooper: 1903-1928, n.d.: Partly Fr., Germ., Russ. and Persian.: Partly signed, copies and cipher.