Although we do not consider Addison as a naturalist, in any of the usual meanings of the term, yet it would be no easy task, even for those who have devoted their undivided attention to the subject, to improve upon the admirable plan of study here laid down. It is, moreover, so especially applicable to the investigation of insects, that it may be more or less put in practice by any person who chooses, in whatever station or circumstances he happens to be placed. Nay, we will go farther; for since it agrees with experience and many recorded instances that individuals have been enabled to investigate and elucidate particular facts, who were quite unacquainted with systematic natural history, we hold it to be undeniable, that _any person of moderate penetration, though altogether unacquainted with what is called “Natural History_,” who will take the trouble to observe particular facts and endeavor to trace them to their causes, has every chance to be successful in adding to his own knowledge, and frequently in making discoveries of what was previously unknown. It is related of M. Pélissan, while a prisoner in the Bastille, that he tamed a spider by means of music. This in conjunction with Evelyn’s observations on hunting-spiders is strong proof of our position, and show that though books are often of high value to guide us in our observations, they are by no means indispensable to the study of nature, inasmuch as the varied scene of creation itself forms an inexhaustible book, which “even he who runneth may read.” “It will be of the utmost importance, in the study here recommended, to bear in mind that an insect can never be found in any situation, nor make any movement, without some motive, originating in the instinct imparted to it by Providence. This principle alone, when it is made the basis of inquiry into such motives or instincts, will be found productive of many interesting discoveries, which, without it, might never be made. With this, indeed, exclusively in view, during an excursion, and with a little attention and perseverance, every walk--nay, every step--may lead to delightful and interesting knowledge.”--“INSECT ARCHITECTURE,” p. 219. [Illustration: _Plate IV._ Spiders, with the processes of Spinning and Weaving.] CHAPTER X. FIBRES OR SILKEN MATERIAL OF THE PINNA.