Early this morning I followed the Monnet method again, this time walking around the Arboretum in Tervuren. The picture is just ten minutes away from central Brussels. By the end of the walk I had thought my way through several issues and got a lot of good exercise and fresh air into the bargain. There are several magnificent arboreal avenues on the circuit we walk. This particular circuit begins and ends with an avenue of oaks, which always puts things in perspective. My rapid internet research has been unfruitful but somebody definitely once said something along the lines of ‘there are two things a man cannot do in one lifetime; build a cathedral and plant an avenue of oaks.’