Grandfather Frog in "Billy Mink Finds Little Joe Otter"

Grandfather Frog's big goggly eyes flew open, and he was just about to make a frightened plunge into the Smiling Pool when he saw Jerry.
"Have a nice nap?" inquired Jerry, with a broad grin.
"I wasn't asleep!" protested Grandfather Frog indignantly. "I was just thinking."
"Don't you think it a rather dangerous plan to think so long with your eyes closed?" asked Jerry.
"Well, maybe I did just doze off," admitted Grandfather Frog sheepishly.