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The following little treatise does not pretend to be scientific, or complete, or classical. 'it merely deals with an interesting subject from a picturesque, histori cal, and (most especially) a local point of view. The study of marbles, as such, would occupy a life-time, and require an efficient training in the principles of geology, mineralogy, and chemistry. I have done little more than give a list, with approximately ac curate names, of the few hundred species which are found in the churches and galleries of Rome; and which invite the attention of the English visitor, first, because they are beautiful; secondly, because of their historical associations; and, thirdly, because they are confined within the space of a few square miles, and may be leisurely examined in the course of an ordinary season.
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