There were five of them, heroically diving into the canal from the bridge, just like Jasper used to do when he was a teenager. After taking the pictures, I watched them for a while and then saw them carefully picking their way to my car, over the gravel.
They asked if I was with the police or if I would report them. Apparently, it is no longer allowed to risk your neck jumping off the bridge. I don't think the authorities minded much in Jasper's time. We had a nice talk about many things including the question if an American dog would feel at home in Holland.