Transcriber's note:
- pg [viii] Changed: Zagohuan to: Zaghouan
- caption in [Plate II.] Changed: FAC SIMILIE to: FAC SIMILE
- pg [299] Changed: — Bel-Khair to: — Bel-Khair, 78
- Minor changes in punctuation have been done silently.
- Other spelling inconsistencies have been left unchanged.