This is the original (slightly Photoshopped) cartoon referred to in the note to American Lights.
A Gendarme Boiling Milk in His Hat
From way back in 1971. The pastime was to listen to heady music and draw. I'm not just talking about pencils.
-------------------- © BH, 1971
It's one of those 'it started with A and finished with Z' exercises. It spawned a later cartoon (nearly 20 years!) which was published in Dundee Street Life in 1988. It's called L'eau et l'eau. The style had firmed up by then. I mean, it had to, really.