Complex sentence: In that story the family name is Mannering-Phipps, not Wooster, and the story has never been included in collections of Jeeves and Wooster materials, however the incidents described in "Extricating Young Gussie" are referred to in later stories.
Split into simpler sentences: In that story the family name is Mannering-Phipps, not Wooster, and the story has never been included in collections of Jeeves and Wooster materials. However, the incidents described in "Extricating Young Gussie" are referred to in later stories.