Recherche dans la collection - Coal vaults Citadel of Quebec. Sketch to shew the portion of retaining wall of terreplein between sallyport & coal vaults which requires to be rebuilt not provided for in contract, To accompany my letter to the Commanding Royal Engineers in Canada dated 10th July 1848. A. Beatty Capt. Com R. Engr. Dist. C.E. 10th July 1848. [architectural drawing]