Doonesbury by Garry Trudeau for July 09, 1977
Transcript:
Rick: Onto anything yet, sleuth? Joanie: Another piece of tape and I'll know... Hey! A parking ticket! I've reconstructed a parking ticket, Rick! Rick: Park's parking ticket? Joanie: Yeah! And it gives the location of the violation! Don't you kinda wonder who might live near there? Rick: Uh... yeah! I'll run it down for you, okay? Joanie: No! It's my clue! I already leaked you something for your birthday!