This book is referred to as al Umm or the Mother, of the Maliki school
from: Actes de vente d’esclaves et d’animaux d’Egypte medievale, Volume 2 by Yusuf Ragib
In the Mudawwana volume X p. 183 the Hadam of Sind, the Zang and similar groups are placed among the wild slaves.
Those slaves devoid of all attraction like the Zang from south of Ethiopia, to be used in household duties, and in who a pregnancy would not influence the price or only little (for those slaves it was not important to state that they were pregnant when being sold)
Taken from: http://www.islamweb.net/emerath/index.php?page=showfatwa&FatwaId=85298
I said: Did Malik dislike profiting from the bones of the Maytah (dead animal not slaughtered according to Sharia). Malik said: I do not think that the Maytah bones should be sold or bought neither should the tusk of the elephant. No one should trade with it or comb with its combs or anoint one’s body with its grease. Ibn Rushd said: Malik disliked the horn but did not forbid it.
Note: Sahnun is an authority in Maliki jurisprudence.