Complex sentence: Which Alphone tells Neville that he's searching for the Buried Pyramid, the Tomb of Neferankhotep, who may also have been Moses the Lawgiver and that a lady gave him the journal of an explorer named Chad Spice.
Split into simpler sentences: Which Alphone tells Neville that he's searching for the Buried Pyramid. A lady gave him the journal of an explorer named Chad Spice.