Eu pesquisei e procurei, mas não parece haver nenhuma indicação do que o Ned estava realmente escrevendo, ou se ele acabou escrevendo a letra no final.

Possibilidades

Carta para sua esposa Ned > e Catelyn não estavam inicialmente apaixonados ou determinados a se casar. No entanto, após a passagem de Brandon Stark - que estava noivo de Cat-Ned, honra-limite para seguir com o noivado e eles se casaram.

Carta ao seu filho (Robb)
Robb sendo o herdeiro de Ned e atual chefe ₁ de Winterfell e House Stark , Ned precisa informá-lo pelo menos uma última vez de todas as coisas importantes que Robb precisa considerar, ou seja:

• R + L = J?
• Robert não deixou herdeiros legítimos
• Arya e Sansa em cativeiro, possivelmente em perigo
• Não confie em Mindinho
• Não confie em Varys
• Não confie em ninguém
• Não confie em Mindinho

Carta para Howland Reed
Este é praticamente o plano de fuga de Ned. Howland Reed é um personagem misterioso na melhor das hipóteses, e sabe-se que possui pelo menos alguma mágica ou truque, ele também conhece algumas coisas interessantes ₂ . Ned poderia ter escrito para Howland explicando sua posição atual e poderia ter pedido ajuda, ou deixado que Howland soubesse que ele estava sozinho com as conseqüências do Torre da Alegria saga.

Carta a Jon Snow
Esta parece ser a possibilidade favorita de todos. Nós queremos ver pelo menos alguma prova de Jon pais. Que pena se Ned levar este segredo enorme para o seu túmulo! No programa , Ned ainda promete a Jon que ele lhe contará sobre sua mãe quando eles se encontrarem ao lado - nos sentimentos!

Para mim, isso é o mais improvável; algo tão grande e transformador não teria sido colocado em uma carta. Embora, este poderia ser o motivo pelo qual Ned não terminou escrevendo a carta, sabendo que Varys ia ler!

Carta ao Ioren
Esta é minha possibilidade favorita. Yoren parece estar convenientemente presente em Baelor's Sept para resgatar Arya ; porque? qual é o seu propósito de estar lá?

Perguntei esta pergunta nos fóruns de Westeros.org para ver se podemos obtenha uma resposta melhor. Aqui está um detalhamento de minha possibilidade favorita .

O usuário BigReadEyes escreve:

I think the answer is in AGOT chapter 58 or Eddard XV. Varys in disguise visits Ned in the dungeon. Varys tells Ned that Arya escaped and fled & that Sansa has pleaded that Ned’s life be spared.

Varys drops the bomb: “I trust you realize that you are a dead man, Lord Eddard.”

I interpret that to mean that it does not matter what Ned does or does not do, Ned is a dead man.

The two carry on their conversation. Eddard asks

Would you at least consent to carry a message out for me? “That would depend on the message. I will gladly provide you with paper and ink, if you like. And when you have written what you will, I will take the letter and read it, and deliver it or not, as best serves my own ends.”

The conversation continues. Varys says on the morrow Cersei will visit […]

“So what is your answer, Lord Eddard? Give me your word that you’ll tell the queen what she wants to hear when she comes calling.”

Ned is not willing to do that until Varys brings Sansa into the conversation with the insinuation of threat against her life.

“Surely you did not think I’d forgotten about your sweet innocent, my lord? The queen most certainly has not."

I assumed that Ned was actually going to be given the chance to take the Black. I was wrong. He was a dead man. Taking the Black was a farce. Varys confirmed it. Insinuating that if Eddard admitted to being a traitor Ned could save Sansa.

[…]Yoren grabs Arya. Ned is beheaded. Then in ACOK chapter 1 or Ayra I Yoren tells her:

“Here’s something you don’t know. It wasn’t supposed to happen like it did. I was set to leave, wagons bought and loaded, and a man comes with a boy for me and a purse of coin, and a message, never mind who it’s from. Lord Eddard is to take the Black, he says to me, wait, he will being going with you. Why do you think I was there? Only something went queer."

I think that Eddard decided to send a message to Yoren that the accusations of treason were false, along with a bit of other information. I think that Eddard’s message to Yoren served Varys’ purpose.

Isso para mim parece o cenário mais plausível, Ned está mais preocupado com suas filhas inseguras, e provavelmente gostaria que elas fossem o mais seguras possível. Nesse ponto, todos os nórdicos que ele trouxera estavam mortos ou desaparecidos, então Yoren era sua única escolha.

Eu vou com a teoria de Stannis e, como acontece, Ned escreveu uma carta para Stannis que nunca saiu de Porto Real.

(como op pedido sem spoiler tags, estou respondendo sem ele também, espero não estragar isso para quem não leu os livros)

AGOT, capítulo 47, Eddard

Ned turned to Tomard. “The Wind Witch sails on the evening tide. Have you chosen the escort?”

“Ten men, with Porther in command.”

“Twenty, and you will command,” Ned said. Porther was a brave man, but headstrong. He wanted someone more solid and sensible to keep watch over his daughters.

“As you wish, m’lord,” Tom said. “Can’t say I’ll be sad to see the back of this place. I miss the wife.”

“You will pass near Dragonstone when you turn north. I need you to deliver a letter for me.”

Tom looked apprehensive. “To Dragonstone, m’lord?” The island fortress of House Targaryen had a sinister repute.

“Tell Captain Qos to hoist my banner as soon as he comes in sight of the island. They may be wary of unexpected visitors. If he is reluctant, offer him whatever it takes. I will give you a letter to place into the hand of Lord Stannis Baratheon. No one else. Not his steward, nor the captain of his guard, nor his lady wife, but only Lord Stannis himself.”

“As you command, m’lord.”

When Tomard had left him, Lord Eddard Stark sat staring at the flame of the candle that burned beside him on the table. For a moment his grief overwhelmed him. He wanted nothing so much as to seek out the godswood, to kneel before the heart tree and pray for the life of Robert Baratheon, who had been more than a brother to him. Men would whisper afterward that Eddard Stark had betrayed his king’s friendship and disinherited his sons; he could only hope that the gods would know better, and that Robert would learn the truth of it in the land beyond the grave.

Ned took out the king’s last letter. A roll of crisp white parchment sealed with golden wax, a few short words and a smear of blood. How small the difference between victory and defeat, between life and death.

He drew out a fresh sheet of paper and dipped his quill in the inkpot. To His Grace, Stannis of the House Baratheon, he wrote. By the time you receive this letter, your brother Robert, our King these past fifteen years, will be dead. He was savaged by a boar whilst hunting in the kingswood …

The letters seemed to writhe and twist on the paper as his hand trailed to a stop. Lord Tywin and Ser Jaime were not men to suffer disgrace meekly; they would fight rather than flee. No doubt Lord Stannis was wary, after the murder of Jon Arryn, but it was imperative that he sail for King’s Landing at once with all his power, before the Lannisters could march.

Ned não estava informando Stannis sobre a verdadeira Parentage de Joffrey, Myrcella e Tommen. Ned quer que Stannis em Kings Landing reivindique o que é seu por direito. No momento da prisão de Ned há apenas 2000 mantos de ouro e alguns guardas de Lannister, então será relativamente fácil para Stannis tomar Kings Landing, se ele age rapidamente.