Under these superior and intermediate authorities stood the local officials, the presidents of the Egyptian as of the Greek towns, along with the very numerous subalterns employed in the collecting of the revenue and the manifold imposts laid on business-dealings, and again in the individual district the presidents of the sub-districts and of the villages--positions, which were looked upon more as burdens than as honours, and were imposed by the higher officials upon persons belonging to, or settled in, the locality, to the exclusion, however, of the Alexandrians; the most important among them, the presidency of the nome, was filled up every three years by the governor. The local authorities of the Greek towns were different as to number and title; in Alexandria in particular four chief officials acted, the priest of Alexander,[220] the town-clerk (ὑπομνηματογράφος),[221] the supreme judge (ἀρχιδικαστής), and the master of the night-watch (νυκτερινὸς στρατηγός). That they were of more consequence than the _strategoi_ of the nomes, is obvious of itself, and is shown clearly by the purple dress belonging to the first Alexandrian official. We may add that they originate likewise from the Ptolemaic period, and are nominated for a time by the Roman government, like the presidents of the nomes, from the persons settled therein. Roman officials of imperial nomination are not found among these urban presidents. But the priest of the Mouseion, who is at the same time president of the Alexandrian Academy of Sciences and also disposes of the considerable pecuniary means of this institute, is nominated by the emperor; in like manner the superintendency of the tomb of Alexander and the buildings connected with it, and some other important positions in the capital of Egypt, were filled up by the government in Rome with officials of equestrian rank.[222] [Sidenote: Insurrections.] [Sidenote: In the Palmyrene period.]