The memorial stone at a lock on the Apeldoorn Canal is a reminder of an effort by resistance fighters Albert van de Scheur and Gijs Numan. In the night of 16 to 17 April 1945, they took a Canadian Army reconnaissance unit across this lock to prove that the German occupier had already left Apeldoorn. As a result, the Canadians abandoned their original plan to attack the city after shelling it with artillery.