Ibn al-Qass: Kitab Dala’il al-Qibla (d946)
-----------------------------------------------------
Taken from : La carte circulaire du Kitab dala'il al-qibla d'Ibn al-Qass : représentation du monde et toponymie originales.
Folia Orientalia, XXXVIII (2002), pp. 115-146 By Jean-Charles Ducène
In the southern part of the Indian Ocean after Africa is situated a circular island being called: al Zang. And in the most southern (here on top) tip of Africa is written: Sudan.
No mention to this island is found in the text of Al-Qass.