Right Ho, Jeeves by P. G. Wodehouse
The spectacle in front of Bertie was enough to nonplus anyone - Gussie in scarlet tights and a pretty frightful false beard. When Gussie Fink-Nottle abandons his beloved newts to go courting as Mephistopheles, Bertie Wooster is more than a little bemused. But even the Devil can rely on Jeeves.