507. Possibly the Tau (Τ) sign - as in for instance Tau-ono (the Pleiades) - illustrated a pair of stones, a horizontal 'square slab' on top of a great vertical upright.

And possibly the idea was to convey the sense of pushing up. In which case Tau-ono might mean not 6 (ono) stones but 6 double-stones (doubly good).

... In Hindu legend there was a mother goddess called Aditi, who had seven offspring. She is called 'Mother of the Gods'. Aditi, whose name means 'free, unbounded, infinity' was assigned in the ancient lists of constellations as the regent of the asterism Punarvasu. Punarvasu is dual in form and means 'The Doublegood Pair'. The singular form of this noun is used to refer to the star Pollux. It is not difficult to surmise that the other member of the Doublegood Pair was Castor. Then the constellation Punarvasu is quite equivalent to our Gemini, the Twins. In far antiquity (5800 BC) the spring equinoctial point was predicted by the heliacal rising of the Twins ...

Tauono. 'Six stones' = Pleiades = Matariki. Van Tilburg.

Tautoru. The Belt of Orion. Van Tilburg. Mgv.: 1. Toutoru, Orion's belt. Mq.: tautou, a constellation of three stars. 2. Toutoru. hung by threes. Mq.: tautou, id. Churchill.

Toko. Tokotoko, stick, cane, crutches, axe helve, roller, pole, staff. P Pau.: tokotoko, walking stick. Mgv.: toko, a pole, stilts, staff. Mq.: tokotoko, toótoó, stick, cane, staff. Ta.: too, id. Churchill. The higher-ranked of the two largest political units on Rapa Nui was the Ko Tu'u Aro Ko Te Mata Nui. This literally translates as The Mast/Pillar/Post [standing] Before the Greater Tribes. Toko te rangi, or Sky Propper, is named by Métraux in his corrected Miru genealogy as the thirteenth king of Easter Island and as one of the lineages or subgroups of the Miru. Although we have no record of the Sky Propper legend on Rapa Nui, other Polynesian legends of the Sky Propper are widely known, and they are formative elements in the basic cosmogenic theory of Polynesian belief. Sky (rangi) and Earth (papa) lay in primal embrace, and in the cramped, dark space between them procreated and gave birth to the gods such as Tane, Rongo and Tu. Just as children fought sleep in the stifling darkness of a hare paenga, the gods grew restless between their parents and longed for light and air. The herculean achievement of forcing Sky to separate from Earth was variously performed by Tane in New Zealand and the Society Islands, by Tonofiti in the Marquesas and by Ru (Tu) in Cook Islands. After the sky was raised high above the earth, props or poles were erected between them and light entered, dispelling the darkness and bringing renewed life. One detail which is iconographically of interest is whether the god responsible for separating Earth and Sky did so by raising the Sky with his upraised arms and hands, as in Tahiti and elsewhere, or with his feet as in New Zealand. The actual props, pillars or posts which separated the sky and earth are called toko in New Zealand, to'o in the Marquesas Islands and pou in Tahiti. In Rapanui tuu and pou are known, with pou meaning column, pillar or post of either stone or wood. Sometimes the word is applied to a natural rock formation with postlike qualities which serves as an orientation point. The star Sirius is called Te Pou in Rapanui and functions in the same way. One monolithic basalt statue is called Pou Hakanononga, a somewhat obscure and probably late name thought to mean that the statue served to mark an offshore tuna fishing site. The Rapanui word tokotoko means pole or staff. Sacred ceremonial staves, such as the ua on Rapa Nui, were called toko in Polynesia. Based upon the fact that toko in New Zealand also means 'rays of light', it has been suggested that the original props which separated and held apart Sky and Earth were conceived of as shafts of dawn sunlight. In most Polynesian languages the human and animate classifier is toko-, suggesting a congruence of semantic and symbolic meaning between anthropomorphic form and pole or post. Tane as First Man and the embodiment of sunlight thus becomes, in the form of a carved human male figure, the probable inspiration for the moai as sacred prop between Sky and Earth. The moai as Sky Propper would have elevated Sky and held it separate from Earth, balancing it only upon his sacred head. This action allowed the light to enter the world and made the land fertile. Increasing the height of the statues, as the Rapa Nui clearly did over time, would symbolically increase the space between Sky and Earth, ensuring increased fertility and the greater production of food. The proliferating image, consciously or unconsciously, must have visually (and reassuringly) filled the dangerously empty horizon between sea and land, just as the trees they were so inexorably felling once had. (Van Tilburg)

At the time of the Bull the stars above the head of Cetus had reappeared to visibility around 64 + 16 = 80 right ascension days earlier than at the epoch of rongorongo, and this phenomenon might have been thought of as a great head pushing Aries up - in a way similar to how previously the northern horn on the Head of Taurus had pushed Auriga up:

At Alcyone - i.e. 27 days after the Knot (Al-Risha) at the neck of Cetus - the weather had changed, after the sky roof had been upraised and no longer was 'in close embrace' with Mother Earth.

... another Alcyone, daughter of Pleione, 'Queen of Sailing', by the oak-hero Atlas, was the mystical leader of the seven Pleiads. The heliacal rising of the Pleiads in May marked the beginning of the navigational year; their setting marked its end when (as Pliny notices in a passage about the halcyon) a remarkably cold North wind blows ...

In the pre-Julian Roman calendar (before 46 BC) Januarius had 29 days, not 31, and at the end of Januarius was Alrisha (the Knot).

... Strassmeier and Epping, in their Astronomishes aus Babylon, say that there its stars formed the third of the twenty-eight ecliptic constellations, - Arku-sha-rishu-ku, literally the Back of the Head of Ku, - which had been established along that great circle milleniums before our era; and Lenormant quotes, as an individual title from cuneiform inscriptions, Dil-kar, the Proclaimer of Dawn, that Jensen reads As-kar, and others Dil-gan, the Messenger of Light.

George Smith inferred from the tablets that it might be the Star of the Flocks; while other Euphratean names have been Lu-lim, or Lu-nit, the Ram's Eye; and Si-mal or Si-mul, the Horn star, which came down even to late astrology as the Ram's Horn.

It also was Anuv, and had its constellation's titles I-ku and I-ku-u, - by abbreviation Ku, - the Prince, or the Leading One, the Ram that led the heavenly flock, some of íts titles at a different date being applied to Capella of Auriga.

Brown associates it with Aloros, the first of the ten mythical kings of Akkad anterior to the Deluge, the duration of whose reigns proportionately coincided with the distances apart of the ten chief ecliptic stars beginning with Hamal, and he deduces from this kingly title the Assyrian Ailuv, and hence the Hebrew Ayil; the other stars corresponding to the other mythical kings being Alcyone, Aldebaran, Pollux, Regulus, Spica, Antares, Algenib, Deneb Algedi, and Scheat ...

Possibly the variant of hau tea with one 'eye' (face, mata) at the back side (at left, in the past) together with the normal one in front (at right, ahead) illustrated the reversal caused by the top of the head of the Prince (Ku), at the end of Januarius.

The central vertical line - as if between the pair of 'Tree legs' of the God of Forests (Jupiter, Jus Piter, Father Light, the Oak) - could here correspond to the 'time line' for marking day 136 - 107 = 29 (Mercury):

... Ganz ähnlich is der Name 'Gott von Duazag' des Gottes Nabū ... zu erklären. Er bezeichnet ihn als den Gott des Wachtstums, welches als aus dem Osten stammend betrachtet wird, weil die Sonne, die das Wachstum bringt, im Osten aufgeht. Dass aber Nabū als Ost-Gott aufgefasst wurde, hängt damit zusammen, dass sein Stern, der Mercur, nur im Osten oder Westen sichtbar ist ...

360 + 4 = 364 (= 354 + 10), and 26 (Polaris) + 4 = 30 (Hamal), and Dramasa (320) + 4 = 324 (= 314 + 10).