Moles shift their quarters according to circumstances, and as they swim well, they migrate across rivers; and in sudden inundations are able, not to save themselves alone, but their young, to which they are much attached. The stratagem and caution which they practise in order to secure a bird are highly curious: they approach without seeming to do so, but as soon as they are within reach of their prey, they rush upon it, tear open its body, thrust their snout into the intestines, and revel in their sanguinary feast. They then sleep for three or four hours, and awake with renewed appetite. All mole-catchers will bear testimony to the rapid movements and consequent difficulty of catching these animals. I have watched a gardener stand for half an hour by one of the little hillocks of loose earth, which, from its movement, showed that the mole was there at work, and remain motionless, spade in hand, and when he saw the earth shake, dash his weapon into the heap. The mere uplifting of his arm was sufficient, and before the spade could reach the ground the mole was gone. He could scarcely reckon on securing his victim once out of twenty efforts. No moles are found in the north of Scotland, or in Ireland, which some attribute to soil and climate; but they exist in other parts of Europe under similar circumstances. HEDGEHOGS. Hedgehogs form one of the small groups of insect-eating mammalia, and are remarkable for being also able to eat those substances which are destructive to others; for instance, they will devour the wings of Spanish flies (Cantharides) with impunity, which cause fearful torments to other animals, and not the least to man, by raising blisters on his skin. It would seem that the hedgehog is also externally insensible to poison, for it fights with adders, and is bitten about the lips and nose without receiving any injury. An experiment has been made by administering prussic acid to it, which took no effect. It is well known that hedgehogs are covered with bristles, amounting to sharp prickles, and that they roll themselves up into a ball. This is effected by a peculiar set of muscles attached to the skin, by which they pull themselves into this shape, and at the same time set up every bristle, and drag their head and limbs within. Such is the resistance and elasticity of these bristles, that the owners of them may be thrown to great distances and remain unhurt, and they will even throw themselves down steep places when they wish to move from a particular spot. Hedgehogs are nocturnal animals, and frequent woods, gardens, orchards, and thick hedge-rows. It is in the latter that I have heard of one being mistaken by a hen for a bush, in which she might lay her egg in safety. The fact was announced by the triumphant cackling which these birds vociferate on such occasions: the egg was consequently searched for, and found upon the hedgehog's back.