[SPOILERS] The Contents of a Very Interesting Book in Hyrule Castle

So during a stream on this channel, the guy finds an interesting book in Zelda's Study inside Hyrule Castle. And it tells a lot of interesting details about BotW. Including that the story told in the tapestry is actually 10,000 years old. And goes in-depth of her excavations and investigations of the Guardians, the Sheikah Slate, and the shrines. As well as the name of the Gerudo pilot.

Zelda's Research Notes

Page 1

Today I met with Impa of the Sheikah tribe and began my research into the ancient technology in earnest.

Impa introduced me to Purah and Robbie, other respected members of her tribe.

Tomorrow I embark on an excavation with them.

We Hope to find ancient tech with which to operate the Guidance Stones.

Page 2

Today we uncovered some ancient technology that we believe may have the power to control the Guidance Stone.

It is a rectangular object, small enough to be held in my two hands. Sheikah text is featured prominently on it.

It is made of an unknown material, but we believe it is the same as the shrine scattered across each region.

Impa proposed that I hold on to it for now. I hope that it leads to some new developments in our research.

Page 3

The stone relic we discovered has been named. We are calling it the Sheikah Slate.

We have not found any mention of a name for this object in the records we have unearthed so far...

Nevertheless, Purah insisted we call it the Sheikah Slate, as the relic is a slate made by the Sheikah tribe.

Feels a bit on the nose to me, but it was not a fight I thought I could win.

Page 4

We did it. We were finally able to restore some functionality to the Sheikah Slate.

We have discovered that this stone slate is capable of producing...images. Perfect liknesses of the things you point it at.

Unlike normal pictures drawn by hand, this requires no artist to capture anything in perfect detail.

I deeply admire the accomplishments of Sheikah technology. Still...I know there is more to learn. There must be.

We believe the Sheikah Slate may have a function that will allow it to control the Guidance Stone.

We must continue our research, and quickly.

Page 5

We have started training the Champions who will pilot the Divine Beasts.

It may sound rude that I found this unexpected, but Mipha mastered the controls with surprising ease.

Daruk struggled at first, but eventually got the hang of it. Urbosa and Revali both managed just fine as well.

I can finally see the light of hope in our fight against the rising Calamity.

Page 6

Robbie has restored mobility to many of the Guardians we've excavated.

...But we have still yet to find all of the Guardians. Records mention greater numbers of them-and even other types.

They are said to be stored in five giant columns that rest beneath Hyrule Castle. The thing is...

No matter how I search beneath the castle, I can't seem to locate these columns. They must be buried deep.

Were they perhaps designed to sense the appearance of Calamity Ganon and to only activate upon his return.

Page 7

Countless ancient structures are being discovered across Hyrule...but all attempts to enter them have failed.

Records indicate that these are facilities designed to train the hero who is fated to combat the Calamity.

But the crucial activation mechanism remains a mystery. Is the Sheikah Slate the key to activating them?

That is Purah's theory, and I concur. And yet, my experiments so far have been fruitless.

Still, we must exhaustively investigate all means to opposing the Calamity. We must not give up, no matter what!

Page 8

I spoke with Purah about the Shrine of Resurrection we discovered earlier.

As we suspected, this particular shrine is, in fact, a medical facility with the power to heal.

It also has a long-term stasis function that can be activated and maintained until healing is complete.

In the war against the Calamity 10,000 years ago...were the injuries so great to necessitate such a facility?

If so, I will remain uneasy until we have made all adjustments necessary to restore it to full working order.

I can only pray that even if Calamity Ganon returns, our battle will not require the Shrine of Resurrection's power...