Little Miss Moth by Amy Le Feuvre

CHARLIE was delighted with his packages and wrote a little note thanking them, but he was not allowed out of his bedroom yet, and for the time the little girls had to be content to play without him.

Sir George arrived one morning, wanting to carry off the children to lunch with his wife, but Miss Vale was very stern and would not let lessons be interfered with. So he deferred his invitation to the afternoon, and then they went to tea with Lady Melville instead. As before, Charity and Hope went off with Sir George to see his books and horses, and Faith stayed to talk to Lady Melville. Of course she told her of their new friend, the Pirate, and Lady Melville knew all about him.