With the publication of the Privy Council report in April 1789 and following months of planning, Wilberforce commenced his parliamentary campaign. On 12 May 1789, he made his first major speech on the subject of abolition in the House of Commons, in which he reasoned that the trade was morally reprehensible and an issue of natural justice. Drawing on Thomas Clarkson's mass of evidence, he described in detail the appalling conditions in which slaves travelled from Africa in the middle passage, and argued that abolishing the trade would also bring an improvement to the conditions of existing slaves in the West Indies. He moved 12 resolutions condemning the slave trade, but made no reference to the abolition of slavery itself, instead dwelling on the potential for reproduction in the existing slave population should the trade be abolished. With the tide running against them, the opponents of abolition delayed the vote by proposing that the House of Commons hear its own evidence, and Wilberforce, in a move that has subsequently been criticised for prolonging the slave trade, reluctantly agreed. The hearings were not completed by the end of the parliamentary session, and were deferred until the following year. In the meantime, Wilberforce and Clarkson tried unsuccessfully to take advantage of the egalitarian atmosphere of the French Revolution to press for France's abolition of the trade, which was, in any event, to be abolished in 1794 as a result of the bloody slave revolt in St. Domingue (later to be known as Haiti), although later briefly restored by Napoleon in 1802. In January 1790, Wilberforce succeeded in speeding up the hearings by gaining approval for a smaller parliamentary select committee to consider the vast quantity of evidence which had been accumulated. Wilberforce's house in Old Palace Yard became a centre for the abolitionists' campaign and a focus for many strategy meetings. Petitioners for other causes also besieged him there, and his ante-room was thronged from an early hour, like "Noah's Ark, full of beasts clean and unclean", according to Hannah More.