Which statement in this excerpt from Robert Louis Stevenson’s Treasure Island reveals that Long John Silver is capable of controlling his emotions?

So much I saw, almost in a dream, for I had not yet recovered from my horrid fear of a minute or two before. And then I heard the voice of Captain Smollett issuing orders. The Hispaniola was laid a couple of points nearer the wind and now sailed a course that would just clear the island on the east.

"And now, men," said the captain, when all was sheeted home, "has any one of you ever seen that land ahead?"

"I have, sir," said Silver. "I've watered there with a trader I was cook in."

"The anchorage is on the south, behind an islet, I fancy?" asked the captain.

"Yes, sir; Skeleton Island they calls it. It were a main place for pirates once, and a hand we had on board knowed all their names for it. That hill to the nor'ard they calls the Fore-mast Hill; there are three hills in a row running south'ard—fore, main, and mizzen, sir. But the main—that's the big un, with the cloud on it—they usually calls the Spy-glass, by reason of a lookout they kept when they was in the anchorage cleaning, for it's there they cleaned their ships, sir, asking your pardon."

"I have a chart here," says Captain Smollett. "See if that's the place."

Long John's eyes burned in his head as he took the chart, but by the fresh look of the paper I knew he was doomed to disappointment. This was not the map we found in Billy Bones's chest, but an accurate copy, complete in all things—names and heights and soundings—with the single exception of the red crosses and the written notes. Sharp as must have been his annoyance, Silver had the strength of mind to hide it.

"Yes, sir," said he, "this is the spot, to be sure, and very prettily drawed out. Who might have done that, I wonder? The pirates were too ignorant, I reckon. Aye, here it is: 'Capt. Kidd's Anchorage'—just the name my shipmate called it. There's a strong current runs along the south, and then away nor'ard up the west coast. Right you was, sir," says he, "to haul your wind and keep the weather of the island. Leastways, if such was your intention as to enter and careen, and there ain't no better place for that in these waters."

"Thank you, my man," says Captain Smollett. "I'll ask you later on to give us a help. You may go."

I was surprised at the coolness with which John avowed his knowledge of the island, and I own I was half-frightened when I saw him drawing nearer to myself. He did not know, to be sure, that I had overheard his council from the apple barrel, and yet I had by this time taken such a horror of his cruelty, duplicity, and power that I could scarce conceal a shudder when he laid his hand upon my arm.

A:"Yes, sir; Skeleton Island they calls it.
B:That hill to the nor'ard they calls the Fore-mast Hill; there are three hills in a row running south'ard—fore, main, and mizzen, sir.
C: Sharp as must have been his annoyance, Silver had the strength of mind to hide it.
D:Who might have done that, I wonder?
E: Leastways, if such was your intention as to enter and careen, and there ain't no better place for that in these waters."