Tennyson, as the milk and water of which his books are composed chiefly, make it almost impossible to discover what was the original nature of the materials he has boiled down in it. Mr. Shelley, too, is perhaps somewhat embarrassing to classify; as, though spirits are what he affected most, he made use of a large amount of vegetable matter also. We shall be probably not far wrong in describing his material as a kind of methylated spirits; or pure psychic alcohol, strongly tinctured with the barks of trees, and rendered below proof by a quantity of sea-water. In this division of the poets, however, into animalists, spiritualists, and vegetarians, we must not be discouraged by any such difficulties as these; but must bear in mind that in whatever manner we may neatly classify anything, the exceptions and special cases will always far outnumber those to which our rule applies. But in fact, at present, mere theory may be set entirely aside: for although in the case of action, the making and adhering to a theory may be the surest guide to inconsistency and absurdity, in poetry these results can be obtained without such aid. The following recipes, compiled from a careful analysis of the best authors, will be found, we trust, efficient guides for the composition of genuine poems. But the tyro must bear always in mind that there is no royal road to anything, and that not even the most explicit directions will make a poet all at once of even the most fatuous, the most sentimental, or the most profane. RECIPES. The following are arranged somewhat in the order in which the student is recommended to begin his efforts. About the more elaborate ones, which come later, he may use his own discretion as to which he will try first; but he must previously have had some training in the simpler compositions, with which we deal before all others. These form as it were a kind of palaestra of folly, a very short training in which will suffice to break down that stiffness and self-respect in the soul, which is so incompatible with modern poetry. Taking, therefore, the silliest and commonest of all kinds of verse, and the one whose sentiments come most readily to hand in vulgar minds, we begin with directions, HOW TO MAKE AN ORDINARY LOVE POEM. Take two large and tender human hearts, which match one another perfectly. Arrange these close together, but preserve them from actual contact by placing between them some cruel barrier. Wound them both in several places, and insert through the openings thus made a fine stuffing of wild yearnings, hopeless tenderness, and a general admiration for stars. Then completely cover up one heart with a sufficient quantity of chill church-yard mould, which may be garnished according to taste with dank waving weeds or tender violets: and promptly break over it the other heart. HOW TO MAKE A PATHETIC MARINE POEM.