What does Wemmick tell Pip to look out for when he dines with Jaggers?

Wemmick tells Pip to look out for Jaggers' housekeeper.

“Well,” said Wemmick, “he’ll give you wine, and good wine. I’ll give you punch, and not bad punch. And now I’ll tell you something. When you go to dine with Mr. Jaggers, look at his housekeeper.”

“Shall I see something very uncommon?”
“Well,” said Wemmick, “you’ll see a wild beast tamed. Not so very uncommon, you’ll tell me. I reply, that depends on the original wildness of the beast, and the amount of taming. It won’t lower your opinion of Mr. Jaggers’s powers. Keep your eye on it.”