 Abdullah's daughter-in-law, Khadijah, her cooking, and her green healing poultice (which is effective, although its exact contents are never quite determined) are frequently mentioned.After Abdullah's death ("The Ape Who Guards the Balance") the character appears to Amelia in dreams as a spiritual guide (although it is left ambiguous whether his appearance is a manifestation of Amelia's own subconsciousness or supernatural in nature).Chronologically, the latest book in the series ("Tomb of the Golden Bird")) takes place in 1922-23, around the discovery of Tutankhamen's tomb.