The Burgess Animal Book For Children in "Four Busy Little Miners"

Ryder chuckled. "Now isn't that funny?" he demanded of no one at all, for he was quite alone. Then he answered himself. "It certainly is," said he. "Here I am on my way to learn something about Miner the Mole, and I trip over one of the queer little ridges he is forever making. It wasn't here yesterday, so that means that he is at work right around here now. Hello, I thought so!"