Series Number Id: GSGS 3062; Sheet number: 51b SW2; Edition number: 4a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC02; envelope_number: 32, Manuscript: markings astride Arras - Cambrai road: +quot;1st AR,CA, 1st 2nd AR 3rd AR CA 2nd+quot;.
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