What Eggsy didn't say spelled out the rest. With the rest of the agency possibly compromised, maybe even fighting among Valentine's ranks? Going in by themselves had been the only possible option. Impossibly dangerous, considering two-thirds lacked any real field experience, but entirely necessary.

He should have been there.

"I see." Harry's mouth went dry. The head of the Kingsmen, an organization born to act where the crippled and corrupt government could not, corrupted himself? He didn't want to believe it was true, but Arthur's betrayal was the final piece of the puzzle. It connected previously unrelated information and events and created a perfect, devastating picture.

To Harry's credit he didn't allow the sickness he felt inside to show on his face. The boy's burden was heavy enough, and it shouldn't have been Eggsy's task to take. He should have been the one to see Arthur's deception and deal with it accordingly, but loyalty and age had made him blind and complacent. No better than a greying dog of the crown or cabinet.

"You did right, and you did well. Don't let anyone tell you any differently." He knew it wouldn't assuage Eggsy's guilt, or make up for the high cost of his own ignorance- but it was the truth.

"You saved the world, and you've become a fine gentleman." He inclined his head with a genuine smile, "I'm... very proud of you."