That's an interesting question. For example, the City of New York,
owns Rufus King Manor, a now 25 (?) room house in Jamaica, Queens. He
was known as the "last Federalist, signer, our first ambassador to
Great Britain, and New York's first Senator" I think. The house is in
part open to the public and and he sits in an all white sculpture in
his library (by the way, one of the stoves was made in one of the
Bronx foundries, the Mott foundry, which made many ironworks shipped
around the world. The other "South Bronx" foundry, Janes and Kirtland
made and assembled the Capitol dome for President Lincoln for a little
over a million after building a fireproof Library of Congress).

Rufus King was publicly very opposed to slavery, he bought the place
from a man who had 10 slaves. I have been on two or three archaeology
testing phases there by a couple of RPA archaeologists (Grossman,
Stone) and the question I am not sure was considered hypothetically,
as the practical archaeology, of testing where the new porch,
pathways, and replacement beams in the "summer kitchen" house was the
motivation of the archaeology, why even the location of termite traps
were to be tested. Also, from my experience at the Waverly Plantation
nearby Columbus, Mississippi, the larger "places" for slaves were said
not to be nearby the "big house" and closer to fields further away.

A similar problem was with the "Wanderer". You can find 200 years of
"sheet scatter" behind the house of the ship builder and chandler that
sold it to the Louisiana cotton merchants broker, read about the
boarding of it by the British naval officer in the blockade of Africa,
and his disbelief that a luxury yacht could not be used as such, read
the correction to its building for the bronze plaque on Jekyll Island
Georgia where it put in 1859 with 400 of 600 poor souls who survived
the "Middle Passage" and read how the ship became a chess piece in the
Civil War, used as a very fast mail packet, on both sides, read about
its survivors (the African-American "Doublemint twins" descendants
that anthropologists have found, yet unless someone knows where they
went after being fed from the big cast iron kettle on Jekyll Island
(playground of the more modern rich Americans today) you would have a
hard time finding archaeological evidence, even if you dove onto the
wreck of "Wanderer" of Cape Maysii (old Spanish, named by Christopher
Columbus, the east tip of Cuba near Guantanamo) with its large "water
tanks" put on in Port Jefferson, NY for trans-Atlantic crossing, which
sank in a storm in the "fruit trade" in the 1880's, you would find
little evidence.

I read the real problem too is finding archaeological evidence for it
in East Africa though known to have gone on for centuries in trade to
Asia.

World Archaeology
Publisher: Routledge, part of the Taylor & Francis Group
Issue: Volume 33, Number 1 / June 1, 2001
Pages: 44 - 60

Islam, archaeology and slavery in Africa
J. Alexander

Abstract: Two different types of chattel slavery, those permitted by
the Christian and Islamic religions, were introduced into Africa but
only the Christian slave trade to the Americas has been studied by
archaeologists. The much longer duration (over 1000 years) of the
Islamic slave trade to Asia and of the Dar el Islam in North and East
Africa is at present known only from literary and eyewitness accounts.
It will prove difficult to recognise archaeologically and new
techniques will have to be developed. Even more difficult to recognise
will be the indigenous forms of slavery which existed in many parts of
the continent at the coming of both Christianity and Islam, and the
interaction between the three different concepts on which they were
based.

Keywords: Chattel Slavery Dar El Islam Dar El Mu'HAA Dar El Harb Bilad
Es Sudan Zanj Jihad