Work is now underway on a supplement covering the Battle of the Somme. Here is a map and an aerial photograph of Courcelette. Both are overlaid with information about the attack from the 22nd Canadian Infantry Battalion - the ‘Van Doos’:
Here is a German photo of Courcelette taken before the attack on 15 September, 1915:
And here is the map from Reserve-Infanterie-Regiment 210: