From these muster-rolls I may now observe, that we gained the most important information.

We ascertained beyond the power of contradiction, that more than half of the seamen, who went out with the ships in the Slave-trade, did not return with them, and that of these so many perished, as amounted to one-fifth of all employed.

As to what became of the remainder, the muster-rolls did not inform us.

This, therefore, was left to us as a subject for our future inquiry.
In endeavouring to enlarge my knowledge, my thoughts were frequently turned to the West Indian part of the question, and in this department my friend Richard Phillips gained me important intelligence.

He put into my hands several documents concerning estates in the West Indies, which he had mostly from the proprietors themselves, where the slaves by mild and prudent usage had so increased in population, as to supersede the necessity of the Slave-trade.
By attending to these and to various other parts of the subject, I began to see as it were with new eyes: I was enabled to make several necessary discriminations, to reconcile things before seemingly contradictory, and to answer many objections which had hitherto put on a formidable shape.