GSGS (series); 4040. Sheet 41, 3rd ed. Nord de Guerre grid. Originally published in 1937. Two lines have been drawn in blue pencil in the top left corner. An X in gray pencil, circled in red pencil, is drawn in the top-middle. Held in the Lloyd Reeds Map Collection, call no. G 5830 s50 .G7 MC56J
