Hi Robbin,

You're right, it is not explictly a chaperone's "duty" to find her young charge a husband. However, I think it is rather implied as part of the overall expectation that a chaperone will bring her chaperonee to plenty of balls where she'll be seen by lots of young men and be asked to dance. Catherine's trip to Bath with the Allens is, as you say, her "coming out," which means she is now marriageable. I'm also thinking of Mrs. Jennings's hopes of having all the young ladies in her care in London married by Michaelmas - yes, she is a rather ridiculous character, but the idea is not wholly without foundation.

We know from examples in many of JA's novels that a love of dancing is just one step (no pun intended) removed from being ready and willing to fall in love, since balls were really the only proper environment that unacquainted young people had for meeting, flirting, and forming attachments.