France : sheet 36 N.W. [map]
British War Office ordnance map. Sheet 36 NW of the 1:10 000 map series, covering the Western Front area around Houplines and Frelinghien in northern France. Shows British front line trenches, enemy trenches and obstacles, towns, transport, vegetation and water features. German trenches corrected to 6.8.1916, British to 30.11.1916. Main trenches marked with English names. British front line trenches numbered in sections. Ordnance Survey, December 1916".
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