CHAPTER XI History of the preceding classes, and of their junction, shown by means of a map. CHAPTER XII Author endeavours to do away the charge of ostentation in consequence of becoming so conspicuous in this work. CHAPTER XIII Proceedings of the Committee; Emancipation declared to be no part of its object.--Wrongs of Africa by Mr. Roscoe. CHAPTER XIV Author visits Bristol to collect information.--Ill-usage of seamen in the Slave Trade.--Articles of African produce.--Massacre at Calabar. CHAPTER XV Mode of procuring and paying seamen in that trade; their mortality in it.--Construction and admeasurement of slave-ships.--Difficulty of procuring evidence.--Cases of Gardiner and Arnold. CHAPTER XVI Author meets with Alexander Falconbridge; visits ill-treated and disabled seamen; takes a mate out of one of the slave-vessels, and puts another in prison for murder. CHAPTER XVII Visits Liverpool.--Specimens of African produce.--Dock duties.--Iron instruments used in the traffic.--His introduction to Mr. Norris. CHAPTER XVIII Manner of procuring and paying seamen at Liverpool in the Slave Trade; their treatment and mortality.--Murder of Peter Green.--Dangerous situation of the Author in consequence of his inquiries. CHAPTER XIX Author proceeds to Manchester; delivers a discourse there on the subject of the Slave Trade.--Revisits Bristol; new and difficult situation there; suddenly crosses the Severn at night.--Returns to London. CHAPTER XX Labours of the Committee during the Author's journey.--Mr. Sharp elected chairman.--Seal engraved.--Letters from different correspondents to the Committee. CHAPTER XXI Further labours of the Committee to February, 1788.--List of new Correspondents. CHAPTER XXII Progress of the cause to the middle of May.--Petitions to Parliament.--Author's interviews with Mr. Pitt and Mr. Grenville.--Privy Council inquire into the subject; examine Liverpool delegates.--Proceedings of the Committee for the Abolition.--Motion and Debate in the House of Commons; discussion of the general question postponed to the next Session. CHAPTER XXIII Progress to the middle of July.--Bill to diminish the horrors of the Middle Passage; Evidence examined against it; Debates; Bill passed through both Houses.--Proceedings of the Committee, and effects of them.