In VN’s novel The Real Life of Sebastian Knight (1941) the narrator (Sebastian’s half-brother V.) mentions a black mask that covers Mr. Goodman’s face and compares Mr. Goodman's face to a cow udder:
'Pray be seated,' he said, courteously waving me into a leather armchair near his desk. He was remarkably well-dressed though decidedly with a city flavour. A black mask covered his face. 'What can I do for you?' He went on looking at me through the eyeholes and still holding my card.