continue fighting and devouring each other, till they are all entirely destroyed. Numbers of them are devoured by foxes, weasels, &c. which follow them in their march, so that none are ever known to return from their migrations." "I thanked Dr. Sinclair for his curious and entertraining account, with which, I hope, my dear Louisa, you also have been amused. A very beautiful, large, white cat, took possession of Dr. Sinclair's kneee, the moment he seated himself in his elbow chair by the fire-side. It licked his hand in a caressing manner, and seemed, by every means in its power, to testify the greatest affection towards him. From the old gentleman's kindness, in giving me so amusing an account of the Leming, I was encouraged to enter into conversation with him upon the merits of his cat. 'Some naturalists,' said I, 'have represented that animal as insensible of kindness, and incapable of attachment; but I cannot help thinking this is a great mistake. We have a cat, at houme, that is very fond of me; and yours, Sir, seems much attached to you.' 'The cat is, on many accounts, unjustly aspersed,' said he: 'excepting the dog, I know of no animal that appears capable of stronger attachment. It is also reproached with treachery and cruelty; but are not the artifices it uses, the particular instincts which the all-wise Creator has given it, conformable to the purposes for which it is designed? Being destined to prey upon the mouse, a lively, active animal, possessing many means of escape, artifice is absolutely necessary for the accomplishment of its end. I can, however, say nothing in extenuation of its cruelty, in sporting with the unfortunate victim that falls into its power, in prolonging its tortures, and putting it to a lingering death. This, it must be confessed, is not a very favourable trait in its character. Notwithstanding all this, it certainly renders very essential services to man, and merits, in return, his kindness and protection.' I admired the beauty of Tom, for so Dr. Sinclair calls his favourite. 'His beauty is not his most remarkable property,' said the Doctor: 'this cat was once the cause of detecting a murderer.' I was astonished, as I doubt not, you, Louisa, will be also, and requested he would relate to me the particulars of so extraordinary a fact. This he kindly did, as follows: