Collection search - Fort No. 3 Details of double caponier left flank. Approved by D.C.R.E. 18 June 1867 Sd George Hams, Lieut. R.E. Sd. P. Fraser, Sergt. R.E. 17-6-67. Sd. T.L. Gallwey, Col. R.E. 6-7-67. [architectural drawing]