For three days Viserion and Rhaegal ranged for miles incinerating the army of wights in the wilds. You could see them from the top of Wall. Small specks in the sky became great gouts of flame. Periodically one would fly back towards them, swooping and circling until they spotted Ser Jorah, then with a roar and belch of flame the beast would fly back out its brother.
For his part of the sceptical, all Jorah had to do was whisper the words Danerys had taught him to the dragons
"Ossēnātās morghe timpa vala se māz va Dōros e drakarys" Which meant, "kill the dead white man that come towards the Wall with dragon fire". At least he hoped that was what the words meant, but the dragons seemed to understand. Jorah didn't speak Valyrian and for all he knew he could be telling the dragons to "go wake up a tree and set it on fire!"
The Nights Watchmen and the Unsullied garrisons went to work assembling and making trebuchets, sling shots, arrow heads and fashioning blades from the dragon glass. The plan was to use the dragons to rid them of the wights, then use the dragon glass to kill the white walkers. They needed to have weapons ready to use for distance attacks and hand-to-hand combat.
The dragon glass was brought by ship from Eastwatch-by-the-sea and carted to the various wildling camps to be turned into weapons. Any off-cuts and waste from the weapon making would be used as ammunition for the trebuchet.
While all of this activity raged around them, Tyrion spent his time with Sam in the library. Not perhaps the best use of their time, but neither man could claim to be any kind of soldier. Sam was too and timid and Tyrion too small to of much use to the fighting men. They spent their time researching wights and white walkers. It had been centuries since such creatures roamed the land and very little was known about their abilities and more importantly how to kill them.
Fire worked on the wights, but no-one knew what effect dragon fire would have on the Others. Dragon glass was their only defence, but they had to know what else to expect from their enemy.
"Oh!" Tyrion heard from the other side of old Maester Aemon's library.
"Another parchment cut?" Tyrion quipped.
"Look at this!" Sam waddled over to where Tyrion sat, and handed him a letter. The parchment did not look to be very old, but the wax seal had fallen off and been lost. Tyrion held the letter closer to his lantern and began to read.
He re-read the letter twice before he calmly folded and tucked it inside his tunic. Sam watched him suspiciously.
"Now is not the time to make this known." He told Sam.
"But.." Sam started to protest but Tyrion held up a hand to silence him.
"This has been a secret for two decades, it can wait a little longer. The parties concerned did not want this information made known to the world, so let us respect their wishes for a little longer."
"I.. I just think."
"Sam trust me. I will keep this letter safe and when the time is right we will reveal its contents. Let us win this war first. Let's not distract him at the moment, he has enough on his shoulders."
Reassured that Tyrion would do the right thing he nodded.
"Now shall we take a trip to the top of the Wall and see if our scaly friends have been making an impression?" Tyrion suggested. He wanted to distract Sam from the letter he had just discovered. It contents were shocking.
Up on the Wall itself one of the trebuchet had been assembled and the men were working to haul up buckets of shards of dragon glass.
They found Jon standing beside a barrel of ice.
"Any sign of the white walkers?" Tyrion asked him.
"Not yet but they can't be far away. There haven't been any new sightings of wights since the dragons began their runs." Jon told them.
"And the dragon glass weapons?"
"Proving difficult to form but the wildlings are working on it. The first batches have been sent along the Wall and the other trebuchet are almost complete. Have there been any ravens from the south?"
"Yes. There haven't been any sightings on this side of the Wall. There are another two thousand soldiers less than 30 miles away." Sam provided.
"Good I have a feeling we'll need them sooner than later. Did you find anything in Maester Aemon's chambers that might help?" Jon adjusted his heavy cloak and scratched at his ear.
Sam shook his head.
"Well I guess we will have to rely on the dragons and the weapons we have."