Know, Liberty and I are still the same
Congenial--ever mingling flame with flame!
Why must I Afric's sable children see
Vended for slaves, though born by nature free,
The nameless tortures cruel minds invent
Those to subject whom Nature equal meant?
If these you dare (although unjust success
Empow'rs you now unpunish'd to oppress),
Revolving empire you and yours may doom--
(Rome all subdu'd--yet Vandals vanquish'd Rome)
Yes--Empire may revolt--give them the day,
And yoke may yoke, and blood may blood repay."

Wallis, in his System of the Laws of Scotland, maintains, that "neither men
nor governments have a right to sell those of their own species. Men and
their liberty are neither purchaseable nor saleable." And, after arguing
the case, he says, "This is the law of nature, which is obligatory on all
men, at all times, and in all places.--Would not any of us, who should be
snatched by pirates from his native land, think himself cruelly abused, and
at all times entitled to be free? Have not these unfortunate Africans, who
meet with the same cruel fate, the same right? Are they not men as well as
we? And have they not the same sensibility? Let us not therefore defend or
support an usage, which is contrary to all the laws of humanity."

In the year 1750 the reverend Griffith Hughes, rector of St. Lucy, in
Barbadoes, published his Natural History of that island. He took an
opportunity, in the course of it, of laying open to the world the miserable
situation of the poor Africans, and the waste of them by hard labour and
other cruel means, and he had the generosity to vindicate their capacities
from the charge, which they who held them in bondage brought against them,