... Then I become aware of ... a presence - a faint, ghostly glimmering, like moonglow, that has appeared on the solstice stone. I don't know how long it lasts, a second or two only I would guess, but while it is there it seems less like a projection - which I know it to be - than something immanent within the stone itself. And it seems to function as a herald for it fades almost as soon as it has appeared and in its place the full effect snaps on - instantaneously. It wasn't there, and then it's there. As Chris had described, the effect does curiously resemble a poleaxe, or a flag on a pole, and consists of a 'shaft', narrow at the base but widening a little towards the top, running up the left hand side of the solstice stone, surmounted by a right-facing 'head' or 'flag'. An instant later an almond-shaped spot of light, like an eye, appears a few centimeters to the right of the 'flag' and the effect is complete. Weirdly - I do not claim it has any significance - this flag-on-a-pole symbol is the ancient Egyptian hieroglyph neter, meaning 'god', or 'a god' - and not to be understood at all in the Judaeo-Christian usage of that word but rather as a reference to one of the supernatural powers or principles that guide and balance the universe. Manifested here, in this strange Stone Age temple, it glows, as though lit by inner fire ...

... Marija Gimbutas: 'To sleep within the Goddess's womb was to die and to come to life anew'. In a system of reincarnation the old one must die in order to be reborn, of course. At midsummer Sun comes to a standstill, and this must therefore be an occasion when the 'flame of life' had to be transported into a new body ...

The idea of the transmigration of souls was surely a related concept:

... Men's spirits were thought to dwell in the Milky Way between incarnations. This conception has been handed down as an Orphic and Pythagorean tradition fitting into the frame of the migration of the soul. Macrobius, who has provided the broadest report on the matter, has it that souls ascend by way of Capricorn, and then, in order to be reborn, descend again through the 'Gate of Cancer'. Macrobius talks of signs; the constellations rising at the solstices in his time (and still in ours) were Gemini and Sagittarius: the 'Gate of Cancer' means Gemini ...

So my suggestion is that the missing central part of Ba1-21 was a drilled hole intended for the wooden peg on which the flat tablet would hang on the wall.

Papa. 1. Underground rock; motionless; rocky sea bottom; large flat stone; figuratively: tagata papa important man, author of great works. 2. Wooden plank currently used much like a surf-board in the sport called garu; it was formerly called papa gaatu mo te garu, because it was made from dry totora leaves woven into the shape of a plank. 3. To line up things side by side on a flat surface, for instance, to line up fish on top of a flat stone. Vanaga. Shoulderblade. Papapapa, a chill, to shiver, to tremble, to shudder. Churchill. ... The appellation papa indicated a flat horizontal plain. In South America they said Pampas for the such surfaces ...

... Both the C and the B tablets have a hole drilled through the wood, possibly for hanging the tablet on the wall, but surely also for giving an important sign.

C	B

Ba1-21 → 11 * 11	Ba1-22	Ba1-23	Ba1-24	Ba1-25
OCT 21	22	23 (296)	24	25
KAUS MEDIUS = δ Sagittarii, κ Lyrae (277.5), TUNG HAE (Heavenly Eastern Sea) = η Serpentis (277.7), SHAOU PIH (Minor Minister) = φ Draconis (277.8), KWEI SHE = χ Draconis (277.9)	φ Oct. (278.1), KAUS AUSTRALIS = ε Sagittarii (278.3), ξ Pavonis (278.4), AL  ATHFAR (The Talons of the Falling Eagle) = μ Lyrae (278.6) *237.0 = *278.4 - *41.4	KAUS BOREALIS = λ Sagittarii (279.3)	ν Pavonis (280.4), κ Cor. Austr. (280.9) *239.0 = *280.4 - *41.4	Abhijit-22 (Victorious) θ Cor. Austr. (281.0), VEGA = α Lyrae (281.8)
Christmas Eve	Dec 25	26 (360)	27	28
... That the Sun-gods Dionysus, Apollo and Mithras were all also reputedly born at the Winter solstice is well known, and the Christian Church first fixed the Nativity feast of Jesus Christ at the same season, in the year A.D. 273 [→ 3 * 91]. St. Chrysostom, a century later, said that the intention was that 'while the heathen were busied with their profane rites the Christians might perform their holy ones without disturbance', but justified the date as suitable for one who was 'the Sun of Righteousness' ...
CLOSE TO THE FULL MOON:
APRIL 21 (111)	22	23	24	25 (460 / 4)
Well-22 (Tapir) / Arkū-sha-pu-u-mash-mashu-8 (Back of the Mouth of the Twins) δ Columbae (95.2), TEJAT POSTERIOR = μ Gemini, MIRZAM (The Roarer) = β Canis Majoris (95.4), CANOPUS (Canopy) = α Carinae (95.6), ε Monocerotis (95.7), ψ1 Aurigae (95.9) *54.0 = *95.4 - *41.4	No star listed (96)	β Monocerotis, ν Gemini (97.0)	No star listed (98)	ν Puppis (99.2), ψ3 Aurigae (99.4), ψ2 Aurigae (99.5) *58.0 = *99.4 - *41.4 GEMMA (α Cor. Bor.)
St John's Day´(175)	June 25	26 (354 / 2)	27	28
... Midsummer is the flowering season of the oak, which is the tree of endurance and triumph, and like the ash is said to 'court the lightning flash'. Its roots are believed to extend as deep underground as its branches rise in the air - Virgil mentions this - which makes it emblematic of a god whose law runs both in Heaven and in the Underworld ... The month, which takes its name from Juppiter the oak-god, begins on June 10th and ends of July 7th. Midway comes St. John's Day, June 24th, the day on which the oak-king was sacrificially burned alive. The Celtic year was divided into two halves with the second half beginning in July, apparently after a seven-day wake, or funeral feast, in the oak-king's honour ...

But the balance of gravitation was not at the central glyph in line Ba1, because this line carries not 20 + 1 + 20 = 41 but 6 more glyphs: