[1] In connection with this subject it is worth while to mention another change in the division of time, not introduced by Caesar, but which came into general use about a century after. The week of seven days was unknown to the Greeks and to the Romans of the Commonwealth, the days of the month being counted by the phases of the moon. The seven-days division was supposed by the Romans to be Egyptian. We know it to have been Jewish, and it was probably introduced to the general world on the first spread of Christianity. It was universally adopted at any rate after Christianity had been planted in different parts of the Empire, but while the Government and the mass of the people were still unconverted to the new religion. The week was accepted for its convenience; but while accepted it was paganized; and the seven days were allotted to the five planets and the sun and moon in the order which still survives among the Latin nations, and here in England with a further introduction of Scandinavian mythology. The principle of the distribution was what is popularly called "the music of the spheres," and turns on a law of Greek music, which is called by Don Cassius the [Greek: armonia dia teddaron]. Assuming the earth to be the centre of the universe, the celestial bodies which have a proper movement of their own among the stars were arranged in the order of their apparent periods of revolution--Saturn, Jupiter, Mars, the Sun, Venus, Mercury, the Moon. The Jewish Jehovah was identified by the Graeco-Romans with Saturn, the oldest of the heathen personal gods. The Sabbath was the day supposed to be specially devoted to him. The first day of the week was, therefore, given to Saturn. Passing over Jupiter and Mars, according to the laws of the [Greek: armonia], the next day was given to the Sun; again passing over two, the next to the Moon, and so on, going round again to the rest, till the still existing order came out. Dies Saturni, dies Solis, dies Lunae, dies Martis, dies Mercurri, dies Jovis, and dies Veneris. See Dion Cassius, _Historia Romana_, lib. xxxvii. c. 18. Dion Cassius gives a second account of the distribution, depending on the twenty-four hours of the day. But the twenty-four hours being a division purely artificial, this explanation is of less interest. [2] _To Atticus_, x. 12. [3] "Cum vivere ipsum turpe sit nobis."--_To Atticus_, xiii. 28. [4] "Peream nisi sollicitus sum, ac malo veterem et clementem dominum habere, quam novum et crudelem experiri. Scis, Cnaeus quam sit fatuus. Scis, quomodo crudelitatem virtutem putet. Scis, quam se semper a nobis derisum putet. Vereor, ne nos rustice gladio velit [Greek: antimuktaerisai]"--_To Caius Cassius, Ad Fam_. xv. 19. CHAPTER XXVI.