Thomson also, in his Seasons, marks this traffic as destructive and cruel, introducing the well-known fact of sharks following the vessels employed in it:—

Increasing still the sorrows of those storms,
His jaws horrific arm'd with three-fold fate,
Here dwells the direful shark. Lured by the scent
Of steaming crowds, of rank disease, and death;
Behold! he rushing cuts the briny flood,
Swift as the gale can bear the ship along,
And from the partners of that cruel trade;
Which spoils unhappy Guinea of her sons,
Demands his share of prey, demands themselves.
The stormy fates descend: one death involves
Tyrants and slaves; when straight their mangled limbs
Crashing at once, he dyes the purple seas
With gore, and riots in the vengeful meal.

Neither was Richard Savage forgetful in his poems of the Injured Africans: he warns their oppressors of a day of retribution for their barbarous conduct. Having personified Public Spirit, he makes her speak on the subject in the following manner:—

Let by my specious name no tyrants rise,
And cry, while they enslave, they civilize!
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
Empowers you now unpunished, 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 Barbados, 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, as a justification of their own wickedness in continuing to deprive them of the rights of men.

Edmund Burke, in his account of the European settlements, (for this work is usually attributed to him,) complains "that the Negroes in our colonies endure a slavery more complete, and attended with far worse circumstances, than what any people in their condition suffer, in any other part of the world, or have suffered in any other period of time. Proofs of this are not wanting. The prodigious waste, which we experience in this unhappy part of our species, is a full and melancholy evidence of this truth." And he goes on to advise the planters, for the sake of their own interest, to behave like good men, good masters, and good Christians, and to impose less labour upon their slaves, and to give them recreation on some of the grand festivals, and to instruct them in religion, as certain preventives of their decrease.

An anonymous author of a pamphlet, entitled, An Essay in Vindication of the Continental Colonies of America, seems to have come forward next. Speaking of slavery there, he says, "It is shocking to humanity, violative of every generous sentiment, abhorrent utterly from the Christian religion.—There cannot be a more dangerous maxim than that necessity is a plea for injustice, for who shall fix the degree of this necessity? What villain so atrocious, who may not urge this excuse, or, as Milton has happily expressed it,

And with necessity,
The tyrant's plea, excuse his devilish deed?

"That our colonies," he continues, "want people, is a very weak argument for so inhuman a violation of justice.—Shall a civilized, a Christian nation encourage slavery, because the barbarous, savage, lawless African hath done it? To what end do we profess a religion whose dictates we so flagrantly violate? Wherefore have we that pattern of goodness and humanity, if we refuse to follow it? How long shall we continue a practice which policy rejects, justice condemns, and piety revolts at?"