Above the slave markets from Zanzibar1873; Cairo1878; Muscat1840 (left to right)

 
Ahmad al-Azraqi: Akhbar Makkah (Reports on Makka) (858AD)

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Taken from: Concepts and Ideas at the Dawn of Islam‎ by M. J. Kister

                    Die Chroniken der Stadt Mekka, edited by Ferdinand Wüstenfeld

 

 

….from whose family el Mu ‘Awia  had bought the house Sha ‘b on the height between the two houses after the House called
of the Zing in the possession of the Banu Adi or the Banu Gumah purchased by Mu ‘Awia and rebuilt ……

 

Abdullah ben el Mu ‘Awia Zubeir (or Zubayr) owned three houses in a row lying on Mount Ku’eiki’an (Qu'ayqi'an) (in Mekka)
which are called the houses of Zubeir but not the Zubeir (clan) but Abdallah he had bought them from the family Automotiv
ben Nubeih el Sahmi'm part of it is the home of the Zing slaves (raqiqu zanjin). of Abdallah who lived there in the main building,
 he dug a well and allowed by this house a path leading to the red mountains……

 

The mountain group Thabir Plur Athbira consists of six parts:

1 Thabir Geina…..

2 The Thabir el Zang (jabal al-zanj) is so called because the black slaves of Mecca when fetching wood played games there, it
is a part of the...

3 Thabir el Nachilund…….

 

Taken from: Islam, Inc: an early business history : an inquiry into how Muslim ...‎

by Gene W. Heck - 2004

Azraqi informs that there was a special facility in Makkah called the Dar al-Zanj, where black slaves would be sold

 

Taken from: Tiere, Pflanzen, Steine und Metalle in den altsüdarabischen ...by Alexander Sima

Jemen by Werner Daum 

(About the Cathedral in Sanaa)

The walls were made of multicolored stones and surmounted by a frieze of alabaster blocks. The copper door opened on a nave measuring 80 cubits by 40 cubits. The ceiling supported by columns of carved teak, decorated with golden and silver nails. Then came a room to the right measuring 40 cubits and the same to the left, decorated with mosaics with plant and gold star motives.  And below the marble slab (Which formed the dome of the church) was a pulpit from labah-wood (=Yemen word for ebony) with inlays of white ivory.