Elizabeth met with Mr Bingley and they talked about Jane. What did Bingley tell Elizabeth that pleased her?

Bingley inquired about her family, which she immediately construed to mean Jane. 

Bingley expressed great pleasure in the certainty of seeing Elizabeth again, having still a great deal to say to her, and many inquiries to make after all their Hertfordshire friends. Elizabeth, construing all this into a wish of hearing her speak of her sister, was pleased, and on this account, as well as some others, found herself, when their visitors left them, capable of considering the last half-hour with some satisfaction, though while it was passing, the enjoyment of it had been little.