I find it remarkable that people are surprised that there are no records of how the pyramids were built and while the Egyptians drew everything there were no drawings surviving of the means used to construct them. They often use the argument that there are no drawings or descriptions as evidence that they must not have had water under pressure to fill counterweights. But this seems to be the only proffered explanation which is consistent with this historical fact.
The drawing of the Eyes of Horus and Wing of Thot necessary to channel Seker into the []-nw-boat in order to lift the reed floats of heaven would be a somewhat difficult depiction even for a modern artist but using ancient techniques it would be most challenging. If this weren't sufficient to eliminate the survival of drawings it should be considered that if the water source were cold water geysers then their existence and usage might constitute a military secret. These geysers are very easily disrupted and there would be huge amounts of infrastructure associated with their ability to distribute water to important trade crops. It seems to usually be forgotten that the Nile was under water during the peak growing season each year. Crops growing during this time might not only stave off starvation but be critical to trade with their neighbors.
So one might ask, why are their no written descriptions? How is it that something so important would not be written down for posterity. There is a four part answer to this question; first, it was still a military secret. Much of this action took place behind covers during much of history. This was the "hidden place". Secondly, is the simple fact that exceedingly little survives from the time before these geysers ceased around 2300 BC. The things which survive are simply not in this category so there is no record. Thirdly is that these people were highly superstitious and magic was very important to them. Both required that they not invoke their deities for trivial matters. They knew which side their bread was buttered on and they didn't want to upset the status quo. As the geysers began to fail this would become increasingly important.
Fourthly, and most importantly, is that it does survive. There are thousands of words in the Pyramid Texts which paint this story a piece at a time. There are many more words which describe how a very religious and superstitious people view a natural phenomena such as geysers.
Here's one of my favorites.
utterance #473;
926a. To say: The two reed-floats of heaven are placed by the morning-boat for Rē,
926b. that Rē may ferry over on them to Horus who inhabits the horizon, to the horizon.
926c. The two reed-floats of heaven are placed by the evening-boat for Horus who inhabits the horizon,
926d. that Horus who inhabits the horizon may ferry over on them to Rē, to the horizon.
927a. The two reed-floats of heaven are caused to descend for N. by the morning-boat,
927b. that N. may mount on them to Rē, to the horizon.
927c. The two reed-floats of heaven are caused to descend for N. by the evening-boat,
927d. that N. may mount on them to Horus, who inhabits the horizon, to the horizon.
928a. N. mounts on high on this eastern side of heaven where the gods are born;
928b. N. will be born (anew there) like Horus, like him of the horizon.
929a. N. is justified; the ka of N. is justified;
929b. the sister of N. is Sothis; the mother of N. is the morning star.
930a. N. hath found the spirits well-equipped by reason of their mouth,
930b. sitting on the two shores of the śḥśḥ-lake,
930c. the drinking-bowl of each spirit well-equipped by reason of his mouth.
930d. "Hast thou no eyes?", so said they to N.,
930e. the spirits well-equipped by reason of their mouth.
930f. Said he, "a spirit well-equipped by reason of his mouth."
931a. "How has this happened to thee?", so said they to N.,
931b. the spirits well-equipped by reason of their mouth,
931c. "that thou art come to this place which is more august than any place?"
931d. N. is come to this place which is more august than any place.
932a. The two reed-floats of heaven are placed by the morning-boat for Rē,
932b. that Rē may ferry over on them to Horus who inhabits the horizon, to the horizon.
932c. The two reed-floats of heaven are placed by the evening-boat for Horus who inhabits the horizon,
932d. that Horus who inhabits the horizon may ferry over on them to Rē, to the horizon,
933a. because the two reed-floats of heaven were caused to descend for N. by the morning-boat,
933b. that N. may mount on them for life and joy to Rē, to the horizon;
933c. because the two reed-floats of heaven were caused to descend for N. by the evening-boat,
933d. that N. may mount on them to Horus who inhabits the horizon, to the horizon.
934a. N. mounts on high on this eastern side of heaven, where the gods are born;
934b. N. was born (anew there) like Horus, like him of the horizon.
935a. N. is justified; the ka of N. is justified.
935b. Praise be to N.; praise be to the ka of N.
935c. The sister of N. is Sothis; the mother of N. is the morning star.
936a. N. comes (to be) with you:
936b. N. walks with you in the Marsh of Reeds;
936c. he pastures as you pasture in the field of malachite;
937a. N. eats of that which you eat;
937b. N.. lives on that on which you live;
937c. N. clothes himself with that wherewith you clothe yourselves;
937d. N. anoints himself with that wherewith you anoint yourselves;
937e. N. takes water with you out of the mn-canal (or, lake of the nurse) of N.,
937f. the drinking-bowl of each spirit well-equipped by reason of his mouth.
938a. N. sits as he who lives in the great itr.t-palace;
938b. N. commands (each) spirit well-equipped by reason of his mouth;
938c. N. sits on the two shores of the śḥśḥ-lake;
938d. N. commands (each) spirit well-equipped by reason of his mouth.
I would go through this and describe the actions of the counterweights going up and down but it is a little complicated and I'm not certain I understand the whole thing. More importantly though is that this is not the Great Pyramid. This is probably the system used on Djoser's or another of the earlier kings.
The Egyptian word for "pyramid" means "instrument to ascend" or "instrument of ascension". I believe that this instrument was also necessary to keep the sun traveling across the sky over the horizon. The "horizon" was the place these valley dwellers could actually see the horizon. The ancient Egyptian name for the Great Pyramid is "Khufu's Horizon" and it is here on top of the pyramid that was that horizon.
The pyramids were tied closely to the religion and were important to the king's ascension but they were not tombs in the early days. There's also a great deal in the Pyramid Texts about the ceremonies involved in the ascension of the king to heaven. He hardly stopped at the eastern side of the pyramid but continued on to become a spirit among the imperishable stars, the stars which never set. It appears the internal organs were given to Seker, the Head of Lifts, to be purified in the Marsh of Reeds. Even these reeds were an important export item.
It's interesting that the last of the big pyramids was never completed. Something apparently happened relatively quickly to stop its construction. After this pyramids were far far smaller and some are known to have included burials.
Finally, there is a tendency for the Pyramid Texts to be in a sort of novel form. (they need to be put in the proper order) Utterances are often related when they are nearby one another. Here's a little snippet from #275; 950a. The morning-boat calls N.; it is, N. who bails it out.
