His final piece of graphic design was a poster for the New York Peace Campaign in 1969: an ace of spades playing card is laid on a plain white background with the letters "PE" hastily scribbled to the left of it and a question mark to the right.
His final piece of graphic art for the New York Peace Campaign in 1969 involved an ace of spades playing card placed on a simple white background with hastily written "PE" and a question mark beside it.