Any guesses as to this fellow’s profession? You might think he was a cartoonist, but no. Apparently he was well-known enough to have a recognizable caricature. People saw the skinny head and knew: why, that’s Carlos Dummond, beloved Modernist. Not even Frost got that treatment here in the States; even if he did appear on a bill, people would have mistaken him for Carl Sandburg.
Note: the day Alan Ginsburg or Sylvia Plath shows up on my money is the day I switch entirely to plastic.