Meteoric falls, cloud-castles, dust-storms, thunderbolts, earthquakes, fiery appearances about the horizon, violent winds, solar and lunar eclipses, changes in the appearance of stars; rainfall from a cloudless sky, the simultaneous occurrence of wind and rain, the appearance of smoke and sparks where there is no fire, the entry of wild animals into villages, the appearance of rainbow in the sky at night; any unusual appearance of the sky at sunrise or sunset, broken or imperfect halos, rivers running in opposite directions, there being heard the music of the drum in the sky, and the like unusual occurrences should be classified under the heads of the four circles of Vāyu, Agni, Varuṇa and Indra.