The Elk. The Whelk.
Reading edition

A roar of welkome through the welkin Is certain proof you'll find the Elk "in"; But if you listen to the shell, In which the Whelk is said to dwell, And hear a roar, beyond a doubt It indicates the Whelk is "out".
Reading edition

A roar of welkome through the welkin Is certain proof you'll find the Elk "in"; But if you listen to the shell, In which the Whelk is said to dwell, And hear a roar, beyond a doubt It indicates the Whelk is "out".