Frogs are hatched from eggs, in about forty days after they are laid. In about two days after being hatched they assume the tadpole or pollywog form, and feed on pond-weed. When they are three months old, two small feet sprout out near the tail; in a few days more the arms are formed; and now the frog is every way perfectly formed, except that it has a tail! During this state the creature eats very little, and is seen to rise frequently to the top of the water to take breath. He has always before lived like a fish, beneath the wave, but as he is now changing his state, he must get acquainted with the world above the water. In a few hours the tail drops off, and the frog, the real genuine frog, is complete! And one most wonderful thing, is this: the animal not only changes his form and habits, but his food also. While a tadpole, he fed on grass; while a frog, he lives entirely on animal food, as insects and worms. As he cannot find enough of them in the water, he goes forth to hunt them, and takes insects by surprise. Some people, seeing great quantities of toads and frogs in time of a shower, fancy that they are rained down from the clouds. It may be that these little creatures are sometimes scooped up by a whirlwind, or water-spout, and carried to some distant place, when they fall with the rain; but, in general, the abundance of these creatures after a shower, is to be accounted for by the fact that at such a time they all come forth from their lurking-places. Frogs live chiefly on the land, but when cold weather comes, they dive down in the mud, and lie there, in a torpid state, till spring comes back, when they salute its return with a great variety of notes. Some of these are rather plaintive and pleasing; but others are almost as loud and coarse as the voices of bulls. These bellowing frogs are sometimes called Dutch nightingales. In early times, these creatures were so numerous in France, that they waked up the people early in the morning. The rich men used, therefore, to require their servants to go out and beat the frogs and keep them quiet, till they could get through with their morning nap. The Siberian Sable-Hunter. CHAPTER X. Although Alexis did not expect to find letters from home, as he had returned from his hunting expedition earlier than he anticipated, still, on his arrival at Yakutsk, he went to the office where they were to be deposited, if any had come. To his great joy he there found two letters, and on looking at them, recognised the hand-writing of his father upon one, and that of Kathinka on the other. His heart beat quick, as he hurried home to read them alone; in his room. With mingled feelings of hope and fear--of pleasure that he could thus hold communion with his dearest friends--of pain that he was separated from them by thousands of miles--he broke the seal of that which was superscribed with his father’s hand, and read as follows: