These sounds are occasionally of the weirdest and most hair-raising quality; and while the startled listener may possibly have heard it asserted, time and again, by superior persons, that they emanate from sea birds, or from fish, he is perfectly satisfied that neither sea birds nor fish have ever been known to emit such sounds _in the daytime_, and the strain of superstition within him awakes and whispers all sorts of uncanny suggestions, the sea bird and fish theory being rejected with scorn.
