It had become a parliamentary borough in 1832.
Shaftesbury was the first great party leader in the modern sense, and the founder of modern parliamentary oratory.
During the next fourteen years he was one of the most conspicuous figures in the parliamentary history of the time.
He retired to Wimborne and urged upon his parliamentary followers the necessity of securing a new parliament.
It was taken by the parliamentary forces in 1645 after a desultory siege of three years.
The events of these three years taught the Labour leaders that a parliamentary party was of little practical influence unless it was able to cast on all important occasions a solid vote, and to meet the case a new method was devised.
His rivals saw how his intense personal ambition and egoism led him always to assume the chief place, and to use his parliamentary position to establish himself as leader of the nation.