Peanuts by Charles Schulz for October 21, 1954

Transcript:

Lucy looks down at a sitting Snoopy. She asks, "Can you keep that a secret Snoopy?"<br> <br> She stoops in front of him and says, "Can you be tight-lipped? Let me see if you're tight-lipped.."<br> <br> She kneels as he stretches his lips together tightly.<br> <br> She walks off saying, "My secret is safe"<br> <br>