Agatha Gregson tries to prevent nephew Gussie Mannering-Phipps from marrying a vaudeville singer in New York in Extricating Young Gussie by sending another nephew, Bertie Mannering-Phipps, to bring him to his senses. Sister of Gussie's late father Cuthbert, sister-in-law of Gussie's mother Julia. Subsequent to this story her maiden name becomes Wooster; see Agatha Wooster.

• Extricating Young Gussie