Of the four quadrants of the earth, thus agreeing in number with the four triplicities, one is situated in the north-west of the entire earth, and contains Celto-galatia; or, as it is commonly called, Europe. Opposed to this quadrant lies that of the south-east, towards Eastern Æthiopia; it is called the southern part of Asia Magna. Another quadrant of the entire earth is in the north-east, about Scythia, and is called the northern part of Asia Magna. To this is opposed the quadrant of the south-west, which lies about Western Æthiopia, and is known by the general name of Libya. Each of these quadrants contains certain parts, which, in comparison with its other parts, lie more contiguous to the middle of the earth; and these parts, in respect of the quadrant to which they belong, have a situation opposite to the rest of that quadrant, in the same manner as that quadrant itself is situated in regard to the rest of the earth. For instance, in the quadrant of Europe, which is situated on the north-west of the whole earth, those parts of it which lie towards the middle of the earth, and near the angles of the other quadrants, are manifestly situated in the south-east of that quadrant. The like rule obtains in regard to the other quadrants. And hence it is evident that each quadrant is in familiarity with two oppositely-placed triplicities, its whole extent being adapted to the one triplicity which governs it as an entire quadrant; but its particular parts, situated about the middle of the earth, and lying, as regards the rest of the quadrant, in a direction contrary to that assigned to the whole quadrant altogether, being adapted to the other triplicity which rules the particular quadrant lying opposite to it. The planets exercising dominion in both these triplicities also hold familiarity with these particular parts; but, with the other more remote parts of any quadrant, only those planets hold familiarity which rule in the single triplicity to which the whole quadrant is allotted. With the said particular parts about the middle of the earth, Mercury also, as well as the other planets in dominion, bears familiarity, in consideration of his meditative condition and common nature.