Collection search - Quebec. Plan and section shewing the command of No. 1 embrasure left flank of King's bastion over the ditch of the redoubt in the north ravelin and the neccessity for the dwarf traversing platform demanded. To accompany C.A. E. 1851-52 item 21. Copied by Geo, Rankin, Lieut, Royal Engineers, 20th March 1851. [architectural drawing]