An Essay on the Slavery and Commerce of the Human Species, Particularly the African This is a historical book. It tells how The Slavery and Commerce of the Human Species, Particularly the African were effected by these. The dignity of the subject of this little Treatise, not any persuasion of its merits as a literary composition, encourages me to offer it to your Lordship's patronage. The cause of freedom has always been found sufficient, in every age and country, to attract the notice of the generous and humane; and it is therefore, in a more peculiar manner, worthy of the attention and favour of a personage, who holds a distinguished rank in that illustrious island, the very air of which has been determined, upon a late investigation of its laws, to be an antidote against slavery. I feel a satisfaction in the opportunity, which the publication of this treatise affords me, of acknowledging your Lordship's civilities, which can only be equalled by the respect, with which I am, Your Lordship's, much obliged, and obedient servant.