The complement, then, to the purely scientific observations is furnished by these official communications to the kings and others, setting forth in response, no doubt, to commands or inquiries, the meaning of any particular phenomenon, or of the position of the planets, or of any of the stars at any time, or of their movements. Of such communications we have a large number. They illustrate the great attention that was paid to details in the observation of the heavenly bodies. The moon as the basis of the calendrical system occupies the first place in these reports. Its movements were more varied than those of the sun. Through its phases, its appearance and disappearance at stated intervals, a safe point of departure was obtained for time calculations. While the sun through its daily course regulated the divisions of the day, the moon by its phases fixed the division of weeks and months. The moon never appeared quite the same on two successive nights nor in the same part of the heavens. The more variety, the more significance--was a principle of general application in the interpretation of omens. Whether the Babylonians also recognized an influence of the moon on the tides, we have no certain means of determining, but it is eminently likely that trained as their astronomers were in careful observation, this was the case. But apart from this, there were many events in public and private affairs that appeared to them to stand in close connection with the movements of the orb of night. Nothing that occurred being regarded as accidental, the conclusion was forced upon the Babylonians that the time when something was undertaken was of significance. The fact that certain undertakings succeeded, while others failed, was most easily explained upon the theory that there were periods favorable for the action involved and periods unfavorable. The gathering of past experience thus becomes a guiding principle in the interpretation of the movements of the moon; and what applies to the moon applies, of course, to the other planets and to the stars. No doubt other factors are involved, such as association of ideas; but it is evident from a careful study of the omen literature that conclusions drawn from what appears to us as the accidental relation of past occurrences to the phenomena presented by the planets and stars constituted fully three-fourths of the wisdom of the Euphratean augurs. The same report, of which a portion has already been quoted,[560] continues after interpreting the meaning of the equinox with a diagnosis of other concurrent conditions:[561] Sun and moon are seen apart,[562] The king of the country will manifest wisdom.[563] On the fourteenth day sun and moon are seen together, There will be loyalty in the land, The gods of Babylonia are favorably inclined, The soldiery will be in accord with the king's desire, The cattle of Babylonia will pasture in safety.[564] From Ishtar-shumeresh.