2. The period of establishment includes the work between the Restoration and about 1700. Dryden is the central figure. 3. The period of culmination is a brief period covering less than the first quarter of the eighteenth century. Pope is the central figure. 4. The period of decadence extends from about 1725 to the end of the century. Any generalizations concerning the attitude of this classical period toward Nature must be based on a large number of specific instances, but in collecting and using these specific instances certain cautions must be observed. Chief among these is the necessity of keeping in mind the point of view from which the study should be made. It is not the purpose to discover all that has been said about Nature by the classical poets between 1623 and 1798. It is the purpose, rather, to eliminate exceptions, and to dwell on the general, obvious qualities, the typical features, of the classical poet’s conception of Nature. This principle determines the relative importance of the periods noted above. Illustrations drawn from a large number of poems in the second and third periods would serve as the basis for a general statement. Illustrations from periods one and four would need to be scrutinized, for they might be purely classical, or they might be survivals of the Elizabethan romantic age or prophecies of the modern romantic age. Cowley, for instance, belongs to the first classical period because he wrote in couplets, but his diction, his conceits, and in some respects his attitude toward Nature are post-Elizabethan rather than classical. Illustrations from his poems are of value, therefore, for the present purpose, only when they are in accord with the spirit afterward found in the time of Dryden and Pope. So, too, Milton and Marvell, though coming chronologically within the first and second periods, stand in the main quite aloof from any tendencies that can be called classical, and their poetry is referred to only when it seems to illustrate the dominant classical conception. Abundant and valuable illustration of the classical conception may be drawn from the fourth period because tendencies are nowhere more clearly shown than in the inevitable exaggerations of a time of decadence, but the legitimacy of any illustration is determined by its likeness to the dominating traits of the preceding periods. While this study is confined in the main to the poets of the period, journals, letters, travels, essays, and plays have been quoted where they serve as proof that the poetry represents the spirit of the age in which it was written.