Others went off, because it happened that immediately on my interview, I acquainted them with the nature of my errand and solicited their attendance in London.  Conceiving that I had no right to ask them such a favour, or terrified at the abruptness and apparent awfulness of my request some of them gave me an immediate denial, which they would never afterwards retract.  I began to perceive in time that it was only by the most delicate management that I could get forward on these occasions.  I resolved, therefore, for the future, except in particular cases, that when I should be introduced to persons who had a competent knowledge of this trade, I would talk with them upon it as upon any ordinary subject, and then leave them without saying anything about their becoming evidences.  I would take care, however, to commit all their conversation to writing when it was over; and I would then try to find out that person among their relations or friends, who could apply to them for this purpose, with the least hazard of a refusal.

There were others, also, who, though they were not so much impressed by the considerations mentioned, yet objected to give their public testimony.  Those whose livelihood, or promotion, or expectations, were dependent upon the government of the country, were generally backward on these occasions.  Though they thought they discovered in the parliamentary conduct of Mr. Pitt, a bias in favour of the cause, they knew to a certainty that the Lord Chancellor Thurlow was against it.  They conceived, therefore, that the administration was at least divided upon the question, and they were fearful of being called upon, lest they should give offence, and thus injure their prospects in life.  This objection was very prevalent in that part of the kingdom which I had selected for my tour.

The reader can hardly conceive how my mind was agitated and distressed on these different accounts.  To have travelled more than two months,—­to have seen many who could have materially served our cause,—­and to have lost most of them,—­was very trying.  And though it is true that I applied a remedy, I was not driven to the adoption of it, till I had performed more than half my tour.  Suffice it to say, that after having travelled upwards of sixteen hundred miles backwards and forwards, and having conversed with forty-seven persons, who were capable of promoting the cause by their evidence, I could only prevail upon nine, by all the interest I could make, to be examined.

On my return to London, whither I had been called up by the committee, to take upon me the superintendence of the evidence, which the privy council was now ready again to hear, I found my brother:  he was then a young officer in the navy; and as I knew he felt as warmly as I did in this great cause, I prevailed upon him to go to Havre de Grace, the great slave-port in France, where he might make his observations for two or three months, and then report what he had seen and heard; so that we might have some one to counteract any false statement of things, which might be made relative to the subject in that quarter.