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Hostile batteries, smoke screens & place names. London, Corps Topo. Section. 1918
Overprint military map printed on Harbonnieres 1:40 000 base map. Shows the region near Harbonnieres in Picardie [ie Picardy], France, with “positions of hostile batteries, definitely established as active during the week, principal groups of active hostile batteries some of which are not yet definitely pinpointed”, “areas to be screened by smoke”, “bombs from aeroplanes at the hours shown”, and “authorised locality names”
Overprint shows locations of German batteries, places to be smoke screened and bombed, French cemetery, aerodrome, named towns and villages. Base map shows place names, roads, railways, forests, rivers, and creeks.