Sheet number: 51BNW2 (part of). "Corrected to 14-4-17." "J. [XVII] Corps. T[opo].S[ection]. No. M.8 (b)." Detail and grid grey; German trenches and names continuous red; British trenches pecked red. Printed in field on Corps Ellam duplicator. Used by Major J.C. Thomson MC (OC 20th Siege Battery, 8-inch hows)., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC17; envelope_number: 482