High Resolution Barrage Map [1:20,000]. Light linen backing. Trenches corrected to 20-8-18. four complete adjacent maps joined to form one large map. Lines indicating inter-brigade boundaries as well as the southern boundary of the Canadian Corps. Lines also indicating 1st, 2nd and 3rd Canadian Division objectives. Sheet numbers: 51b SE, 51a SW, 57c NE, 57b NW
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War Office. General Staff. Geographical Section, Field Service Battalion, Royal Engineers</div>
McMaster University, Fonds: WW1 Trench Maps: France, Box no. 10, Envelope no. 001, Database Number 433