When Molly can't fix a problem one way, what she normally does is turn the problem upside down to make it look different. Now she's had a wonderful idea. She knows that David's mother went to New York to look for work, and Molly knows that people read ads to find work. So Molly asked Doctor Cater to call his son to put an ad in the paper for a French governess with a little boy, and in this way hopes that Molly will be able to get in touch with David's mother...