The idea behind these and other similar beliefs was that "the four red divisions" or the "four brown divisions" of the world were controlled by deities or groups of deities, whose influences for good or evil were continually "flowing", and especially when winds were blowing. A good deity sent a good wind, and a bad deity sent a bad wind. Each wind was coloured. The north was the airt[156] (cardinal point) of evil, misfortune, and bad luck, and was coloured black; the south was the source of good luck, good fortune, summer, and longevity, and was coloured white; the east was a specially sacred airt, and was coloured purple-red, while the west was the airt of death, and was coloured dun or pale. East and south and north and west were connected. There were various colours for the subsidiary points of the compass.

This doctrine was a very ancient one, because we find that in the Gaelic language the specially good words are based on the word for the south, and the specially bad ones on the name for the north. In Welsh and Gaelic the north is on the left hand and the south on the right hand, the east in front, and the west behind. It is evident, therefore, that the colour scheme of the cardinal points had a connection with sun worship. A man who adored the rising sun faced the east, and had the north on his left and the south on his right. In early Christian Gaelic literature it is stated that on the Day of Judgment the goats (sinners) will be sent to the north (the left hand) and the sheep (the justified) to the south (the right hand).

The same system can be traced in burial customs. Many of the ancient graves lie east and west. Graves that lie north and south may have been those of the members of a different religious cult, but in some cases it is found that the dead were placed in position so that they faced the east. In the most ancient graves in Egypt men were laid on their right sides with their feet directed towards the "red north" and their faces towards the golden east. Women were laid on the left sides facing the east. Red was in ancient Egypt the male colour, and white and yellow the female colours; the feet of the men were towards the red north and those of women towards the white or yellow south.

All ancient British burials were not made in accordance with solar-cult customs. It can be shown, however, in some cases that, although a burial custom may appear to be either of local or of independent origin, the fundamental doctrine of which it was an expression was the same as that behind other burial customs. Reference may be made, by way of illustration, to the graves at the stone circle of Hakpen Hill in the Avebury area. In the seventeenth century a large number of skeletons were here unearthed. Dr. Toope of Oxford, writing in 1685, has recorded in this connection:[157]

"About 80 yards from where the bones were found is a temple,[158] 40 yards diameter, with another 15 yards; round about bones layd so close that scul (skull) toucheth scul. Their feet all round turned towards the temple, one foot below the surface of the ground. At the feet of the first order lay the head of the next row, the feet always tending towards the temple."

Here the stone circle is apparently the symbol of the sun and the "Mecca" from which the good influence or "luck" of the sun emanated and gave protection. One seems to come into touch with the influence of an organized priesthood in this stone circle burial custom.

The more ancient custom of burying the dead so that the influences of the airts might be exercised upon them according to their deserts seems, however, to have been deep-rooted and persistent. In England, Wales, Scotland, and Ireland the custom obtained until recently of reserving the north side of a churchyard for suicides and murderers; the "black north" was the proper place for such wrong-doers, who were refused Christian rites of burial, and were interred according to traditional pagan customs. The east was reserved chiefly for ecclesiastics, the south for the upper classes, and the west for the poorer classes. Funeral processions still enter the older churchyards from the east, and proceed in the direction of the sun towards the open graves. Suicides and murderers were carried in the opposite direction ("withershins about").[159] The custom of dealing out cards "sunwise", of stirring food "sunwise", and other customs in which turning to the right (the south) is observed, appear to be relics of the ancient belief in the influences of the airts. Some fishermen still consider it unlucky to turn their boats "against the sun". It was anciently believed, as references in old ballads indicate, that a tempest-stricken vessel turned round three times against the sun before it sank. According to a belief that has survival in some parts of the north of Scotland, the devil will appear in the centre of a stone circle if one walks round it three times "against the sun" at midnight. Among the ancient Irish warriors, Professor W. J. Watson tells me, it was a mark of hostile intent to drive round a fort keeping the left hand towards it. The early Christian custom of circulating chapels and dwelling-houses "sunwise" was based on the pagan belief that good influences were conjured in this way.

As the winds were coloured like the airts from which they blew, it was believed that they could be influenced by coloured objects. In his description of the Western Isles, Martin, a seventeenth century writer, referring to the Fladda Chuan Island, relates:

"There is a chapel in the isle dedicated to St. Columba. It has an altar in the east end and therein a blue stone of a round form on it, which is always moist. It is an ordinary custom, when any of the fishermen are detained in the isle by contrary winds, to wash the blue stone with water all round, expecting thereby to procure a favourable wind.... And so great is the regard they have for this stone, that they swear decisive oaths upon it."