Paddy The Beaver in "Jerry Muskrat Learns Something"

"Why, I've dug it all away. That's what made the water so muddy," replied Paddy.
"But what did you build it for in the first place?" Jerry asked.
"Because I had to have something solid to rest my sticks against while I was building my walls, of course," replied Paddy. When I got the tops fastened together for a roof, they didn't need a support any longer, and then I dug it away to make this room. I couldn't have built such a big room any other way. I see you don't know very much about house-building, Cousin Jerry."