Complex sentence: Ali Pasha Sherif was reputed to have kept extensive records and manuscripts about his stud, which were passed onto his son, Huseyn Bey Sherif, who lent them to King Fouad.
Split into simpler sentences: Ali Pasha Sherif was reputed to have kept extensive records and manuscripts about his studs. These records were passed onto his son Huseyn Bey Sherif, who lent them to King Fouad.