As regards the later of these classes, the same difficulty does not exist. Mr. Rickman divided the whole of the buildings of Pointed Architecture into three Styles or Classes, which he denominated "Early English," "Decorated," "Perpendicular." The titles of the two last he professed to derive from the character of their windows, conceiving, no doubt justly, that no part of a Gothic building exhibits peculiarities of Style in so prominent and characteristic a manner as its windows. In strict accordance with this rule, which may be assumed to be a correct and valuable one, it has already been shown,[B] that had Mr. Rickman gone a step further and classed the whole of the buildings of Pointed Architecture according to the forms of their Windows under _four_ heads, instead of _three_, he would have obtained a classification equally simple, but more intelligible and convenient; he would have obviated much that is confused and indefinite, and therefore perplexing to the Architectural Student, in his description of buildings which belong to the class to which we are now referring, and would have enabled us to compare the buildings of our own Country with those of corresponding character, and nearly contemporaneous date on the Continent, in a manner that would have established an analogy between them, which, according to the present classification, has no apparent existence. The inability to describe, or speak of any of the buildings belonging to either of these two classes, including some of the finest in the kingdom, otherwise than as examples of an intermediate and anomalous character, exhibiting the peculiarities partly of one style and partly of another, but belonging specifically to neither, must be admitted to be a serious defect in all hitherto recognised systems of Architectural Nomenclature; and there are probably few Architecturalists who have not frequently felt the inconvenience arising from the want of more explicit and definite terms than at present exist, by means of which to describe the buildings of these two classes.