He says expressly that they, who go out as pirates, and take away poor Africans, or people of another land, who never forfeited life or liberty, and make them slaves and sell them, are the worst of robbers, and ought to be considered as the common enemies of mankind; and that they who buy them, and use them as mere beasts for their own convenience, regardless of their spiritual welfare, are fitter to be called demons than christians.
He then proposes several queries, which he answers in a clear and forcible manner, showing the great inconsistency of this traffic, and the necessity of treating those then in bondage with tenderness and a due regard to their spiritual concerns.
The _Directory_ of Baxter was succeeded by a publication called _Friendly Advice to the Planters_ in three parts.

The first of these was, _A brief Treatise of the principal Fruits and Herbs that grow in Barbados, Jamaica, and other Plantations in the West Indies_.

The second was, _The Negroes' Complaint, or their hard Servitude, and the Cruelties practised upon them by divers of their Masters professing Christianity_.
And the third was, _A Dialogue between an Ethiopian and a Christian, his Master, in America_.

In the last of these, Thomas Tryon, who was the author, inveighs both against the commerce and the slavery of the Africans, and in a striking manner examines each by the touchstone of reason, humanity, justice, and religion.
In the year 1696, Southern brought forward his celebrated tragedy of _Oronooko_, by means of which many became enlightened upon the subject, and interested in it.

For this tragedy was not a representation of fictitious circumstances, but of such as had occurred in the colonies, and as had been communicated in a publication by Mrs.Behn.
The person who seems to have noticed the subject next was Dr.Primatt.
In his _Dissertation on the Duty of Mercy, and on the Sin of Cruelty to Brute Animals_, he takes occasion to advert to the subject of the African Slave Trade.