|Object type||Black & white - Glass original half plate negative|
|Photographer||Unknown Australian Official Photographer|
|Place made||France: Picardie, Somme, Corbie Albert Area, Ville-sur-Ancre|
|Date made||29 May 1918|
Lieutenant Will Dyson, Australian Official Artist, sketching in the 'Caterpillar', near Ville-sur Ancre, in France. The 'Big' and 'Little Caterpillars', so called from their worm-like appearance on the map, were sunken roads about fifteen or twenty feet deep, outside the village, leading up to Morlancourt Spur and directly across the front of the 6th Infantry Brigade advance in the early morning of 19 May. Both Caterpillars were machine gun nests, and both were cleared by dashing attacks of the 22nd Battalion.