Details you picked up on later?

I loved past threads like these, so let's give a new one a shot.

For me, how long Hickey had been observing crew discontent and the expedition's flaws. Like when Tozer's complaining about the Marines dying first for the spirit-- he's sat directly behind him listening in. Or when Crozier's going through withdrawals, how he makes a sarcastic remark to Little that it must be a really bad case of gastritis. And then quietly observing Goodsir tell Silna (Lady Silence) not to eat from the tins after they've left the ships.

Seems he was counting his ducks from the day Crozier punished him. What are details you picked up on?