Peanuts by Charles Schulz for October 31, 1957
Transcript:
A person covered in a 'ghost' sheet passes another person dressed the same way. They say "Boo!" to each other.<br> <br> Another two 'ghosts' pass each other and greet one another: "Boo!"<br> <br> A 'ghost' person comes upon two people wearing one 'ghost' sheet. The 'ghost' is confused as the twin 'ghost' say "Boo!".<br> <br> The twin 'ghost' explain, "We could only get one sheet!"<br> <br>
They were conjoined twins in life.