11 DECEMBER 1920, Page 15

(To TEE EDITOR or THE " Stmerrroa."1 Sia,—Referring to the

letter from " A. H. S. D." in your issue of December 4th, I have several times heard and traced to its source the curious puffing noise referred to which hedgehogs make when on trek. I heard it for the first time when wander- ing through a wood one evening, and after a little stalking discovered a hedgehog making his way carefully through some long grass. I think there is little doubt that this noise which can be heard for a considerable distance, and rather suggests the quick breathing of an exhausted runner, is a method of keeping touch with other representatives of the species in the