All Roads Lead to Calvary by Jerome K. Jerome

In the spring, Joan, at Mrs. Denton's request, undertook a mission. It was to go to Paris. Mrs. Denton had meant to go herself, but was laid up with sciatica; and the matter, she considered, would not brook of any delay.

"It's rather a delicate business," she told Joan. She was lying on a couch in her great library, and Joan was seated by her side. "I want someone who can go into private houses and mix with educated people on their own level; and especially I want you to see one or two women: they count in France. You know French pretty well, don't you?"