501. The model with a pyramid in time-space in order to accommodate the 5th son (wheel, corner) was evidently used also by the Mayas:

... Behind me, towering almost 100 feet into the air, was a perfect ziggurat, the Temple of Kukulkan. Its four stairways had 91 steps each. Taken together with the top platform, which counted as a further step, the total was 365. This gave the number of complete days in a solar year. In addition, the geometric design and orientation of the ancient structure had been calibrated with Swiss-watch precision to achieve an objective as dramatic as it was esoteric: on the spring and autumn equinoxes, regular as clockwork, triangular patterns of light and shadow combined to create the illusion of a giant serpent undulating on the northern staircase ...

The top platform was probably a representation of the Pegasus Square, one corner of which was defined by Sirrah. The light and shadow serpent (universal sign of a water current),

which was undulating down from the square at the top, flowed down on the northern side of the pyramid for anciently (at the assumed beginning of the precessional cycle) the Square of Pegasus had been at the northern winter solstice.

But already in Babylonian times this Field - submerged like a rice paddy - had been pushed ahead in the Sun year due to the precesson. And half a year later this 'water serpent' had been consumed by all the living creatures down on earth, ultimately to disappear out of reach downwards, drawn by gravity towards the Abyss:

9	Oct 6	7 (280)	8	9	10
	Ca1-16	Ca1-17	Ca1-18 (→ 4 * 29½)	Ca1-19	Ca1-20
	April 6 Al Batn Al Hūt-26 (Belly of the Fish) / Revati-28 (Prosperous) / 1-iku (Field Measure) MIRACH (Girdle) = β Andromedae, KEUN MAN MUN (Camp's South Gate) = φ Andromedae (16.0), ANUNITUM = τ Piscium (16.5), REVATI (Abundant) = ζ Piscium (16.9)  REGULUS (α Leonis)	7 ν Phoenicis (17.4), κ Tucanae (17.6) *342 = *383.4 - *41.4 = 421 - 80 + 1	8 no star listed (18)	9 (365 + 99 = 464) ADHIL (Garment's Train) = ξ Andromedae (19.3), θ Ceti (19.7)	10 (100) KSORA (Knee) = δ Cassiopeiae (20.1), ω Andromedae (20.6), γ Phoenicis (20.8)

Oct 11 (364 - 80)	12	13	14	15 (364 - 84)	16
Ca1-21	Ca1-22	Ca1-23	Ca1-24	Ca1-25	Ca1-26
April 11 (101)  δ Phoenicis (21.5)	12 PINWHEEL GALAXY (M33 Trianguli (22.1), υ Andromedae (22.9)	13 ACHERNAR (End of the River) = α Eridani (23.3), χ Andromedae (23.6), τ Andromedae (23.9)	14 ALSEIPH (Scimitar) = φ Persei (24.5), τ Ceti (24.7)	15 no star listed (25)	16 ANA-NIA-10 (Pillar-to-fish by) χ Ceti (26.1), POLARIS = α Ursae Minoris, BATEN KAITOS (Belly of the Fish) = ζ Ceti (26.6), METALLAH (Triangle) = α Trianguli (26.9)

The Babylonian Field had fishes on both sides, a sign of inundation.

... Though Andromeda has its roots most firmly in the Greek tradition, a female figure in Andromeda's place appeared in Babylonian astronomy. The stars that make up Pisces and the middle portion of modern Andromeda formed a constellation representing a fertility goddess, sometimes named as Anunitum or the Lady of the Heavens ...

The living waters streaming down made Mother Earth come alive again after a dry season. The pair of complementary seasons (water, 'year in leaf') and (dry land, 'year in straw') can perhaps explain the double pair in the 5 days from Anunitum to the Knee of Cassiopeia: