Another class of the priesthood, which we may infer was under the king’s direct control, was the astrologers, whose duty it probably was to make reports to the king of the conjunctions of the heavenly bodies, with a view to ascertaining whether they portended good or evil to the state. No astrological reports written in this early period have been recovered, but at a later period under the Assyrian empire the astrologers reported regularly to the king on such matters, and it is probable that the practice was one long established. One of Hammurabi’s letters proves that the king regulated the calendar, and it is legitimate to suppose that he sought the advice of his astrologers as to the times when intercalary months were to be inserted. The letter dealing with the calendar was written to inform Sin-idinnam, the governor of Larsam, that an intercalary month was to be inserted. “Since the year (i.e. the calendar) hath a deficiency,” he writes, “let the month which is now beginning be registered as a second Elul,” and the king adds that this insertion of an extra month will not justify any postponement in the payment of the regular tribute due from the city of Larsam, which had to be paid a month earlier than usual to make up for the month that was inserted. The intercalation of additional months was due to the fact that the Babylonian months were lunar, so that the calendar had to be corrected at intervals to make it correspond to the solar year.
From the description already given of the code of laws drawn up by Hammurabi it will have been seen that the king attempted to incorporate and arrange a set of regulations which should settle any dispute likely to arise with regard to the duties and privileges of all classes of his subjects. That this code was not a dead letter, but was actively administered, is abundantly proved by many of the letters of Hammurabi which have been recovered. From these we learn that the king took a very active part in the administration of justice in the country, and that he exercised a strict supervision, not only over the cases decided in the capital, but also over those which were tried in the other great cities and towns of Babylonia. Any private citizen was entitled to make a direct appeal to the king for justice, if he thought he could not obtain it in his local court, and it is clear from Hammurabi’s letters that he always listened to such an appeal and gave it adequate consideration.