Eason Chalmers had been complaining to a few buddies while on the ship; he was quite enthusiastic at the time, but he became reticent about bringing up anything from the cruise after returning.
His buddies could be dissuaded with a few words such as "let's not talk about it" or "nothing worth mentioning," but Henry Shipton wasn't so easily fooled.
He specifically asked Eason, who was blatantly playing dumb.
It was obvious that Eason was definitely hiding something.
As for who can make Eason follow orders, the first person to think of is Charlotte Allison, who accompanied him to the cruise dinner.
So here, things become clear: it was Charlotte Allison who made Eason keep quiet.
If Charlotte Allison doesn't want others to know something, it's either dangerous or related to her.
Henry Shipton tended toward the latter.
Henry Shipton was naturally curious about what Charlotte Allison wanted to hide.
