Who is Major Dumbarton from The Penguin Complete Saki and what is their importance? The_Penguin_Complete_Saki English & Literature Major Dumbarton | The Penguin Complete Saki

This is one of the main characters from "The Baker's Dozen" who asks Mrs. Emily Carewe to marry him. He has to try to figure out a way to get past the unlucky fact that they will have thirteen children between them. He realizes that he is counted one of his children twice, meaning they have only twelve and that they can marry.