§10. By epigraphic sources we mean the words that were written, scratched, cut, or stamped on hard materials, such as metal, stone, or wood, without thought of literary finish. These vary from single words to records of very considerable extent, and are briefly called inscriptions. The student may get a good idea of the most ancient and curious by merely turning over a few pages of Ritschl's "Priscae Latinitatis Monumenta Epigraphica" or of Egbert's "Latin Inscriptions." Of one sort of great importance, the legends on coins and medals, many have found their way into American museums. With modern inscriptions on similar materials and for similar purposes every student is, of course, familiar. §11. By monumental evidence we mean all the things actually made by the Greeks and Romans that have come down to us. These things are collectively very numerous and of very many kinds: coins, medals, pieces of jewelry, armor, pottery, statues, paintings, bridges, aqueducts, fortifications, ruins of cities, etc. It is impossible to enumerate them all. It is upon such remains as these that most of the inscriptions mentioned above are preserved. Of the most importance for the study of the private life of the Romans are the ruins of the city of Pompeii preserved to us by the protection of the ashes that buried it at the time of the eruption of Vesuvius in the year 79 A.D. §12. It will be seen at once that the importance of these sources will vary with the nature of the subject we are studying and the fullness of their preservation. For example, we may read in a Roman poet a description of an ornament worn by a bride. A painting of a bride wearing such an ornament would make the description clearer, but any doubt that might remain would be removed if there should be found in the ruins of Pompeii a similar ornament with its character proved by an inscription upon it. In this case the three sources would have contributed to our knowledge. For other matters, especially intangible things, we may have to rely solely upon descriptions, that is, upon literary sources. But it may well happen that no Roman wrote a set description of the particular thing that we are studying, or if he did that his writings have been lost, so that we may be forced to build up our knowledge bit by bit, by putting together laboriously the scraps of information, mere hints perhaps, that we find scattered here and there in the works of different authors, and these perhaps of very different times. It is not hard to understand, therefore, that our knowledge of some things pertaining to Roman antiquities may be fairly complete, while of others we may have no knowledge at all. It may be worth remarking of literary sources that the more common and familiar a thing was to the ancients, the less likely is it that we shall find a description of it in ancient literature.