"For this horse I will pay one hundred English pounds if I must do. No one will have this horse except me. This is my Emilie's horse. It is hers by right." (20.12)
Emilie's grandpapa sees it as his duty to respect her dying wish, devoting his entire life to finding Joey and Topthorn. This guy ain't rich, but he will spend all the money he has to do what's right.