Don Sebastian; or, The House of the Braganza: An Historical Romance, Volume 3
Author: first_name: Anna Maria
last_name: Porter
Language: English
Year: 1809

The young king Sebastian is a captive, and has agreed to accompany his Islamic master on a pilgrimage to Mecca - on condition that he'll be released three days after reaching the holy city.  What his kind master does not know, is that Sebastian's sweetheart Kara Aziek will be in the same caravan... and that Sebastian intends to rescue her from the wedding that awaits at her destination. - Summary by redrun