Literary style, like human personality, is a compound exceedingly difficult of analysis, for when its more obvious constituents are made clear, there still remains an illusive element, consciousness of which leaves the analyst with the unpleasant sensation of not having reached the bottom of the matter. As the most complex phenomenon in literature, style is the resultant of all the forces, known and unknown, underlying literary development, and the method and extent of the contribution made by each of these forces are a matter of probable inference rather than of positive demonstration. For that reason, any attempt, however ambitious, to account for the style of a literary epoch must be content with pointing out those more obvious influences that are combined and reflected in speech and writing, and with ignoring other factors which may escape detection. Under the protection of this confession I shall attempt to make manifest what seems to me the most important influence instrumental in changing the luxuriant prose of the Commonwealth into that of a diametrically opposite nature in the Restoration.