<P> He was succeeded by his stepson William Cowper - Temple (later created The 1st Baron Mount Temple), whose inheritance included a 10,000 - acre estate in the north of County Sligo in the west of Ireland, on which his stepfather had commissioned the building of the incomplete Classiebawn Castle . </P> <P> Historian Algernon Cecil, summed up his greatness: </P> <Dl> <Dd> Palmerston placed his trust...in the Press which he was at pains to manipulate; in Parliament, which he learnt better than any man then living to manage; and the Country, whose temper he knew how to catch and the weight of his name and resources he brought to bear upon every negotiation with a patriotic effontry that has never been excelled . </Dd> </Dl> <Dd> Palmerston placed his trust...in the Press which he was at pains to manipulate; in Parliament, which he learnt better than any man then living to manage; and the Country, whose temper he knew how to catch and the weight of his name and resources he brought to bear upon every negotiation with a patriotic effontry that has never been excelled . </Dd>

At which meeting did the european great powers accept an obligation to end the slave trade