Snoopy Yawning in Nightcap - Classic Peanuts Illustration #3777265 (License: Personal Use)

This classic black-and-white line drawing features Snoopy, the beloved beagle from Charles M. Schulz’s Peanuts, seated upright while wearing a long, floppy nightcap with alternating green and blue stripes and a cream-colored band. His mouth is wide open in a deep yawn, eyes closed, and the cap drapes dramatically over his face and down toward the ground. The transparent background emphasizes the clean, expressive linework characteristic of mid-20th-century comic art.

This image is commonly used on fan sites, merchandising pages, nostalgic retrospectives of Peanuts, and holiday or bedtime-themed content. It matches user intent for searching “Snoopy sleeping,” “Peanuts nightcap,” or “vintage cartoon illustrations.”