" "Ah! that's Madame Karenina," said Vronsky.

"You know her, no doubt?" "I think I do.

Or perhaps not...I really am not sure," Vronsky answered heedlessly, with a vague recollection of something stiff and tedious evoked by the name Karenina.

"But Alexey Alexandrovitch, my celebrated brother-in-law, you surely must know.