Between the 1832 Great Reform Act and the outbreak of World War One in 1914, over 2,600 by-elections took place in Britain. They were triggered by the death, retirement or resignation of sitting MPs or by the appointment of cabinet ministers and were a regular feature of Victorian and Edwardian politics. They furnished political parties and their leaders with a crucial tool for gauging and mobilising public opinion. Yet despite the prominence of by-election contests in the historical records of this period, scholars have paid relatively little attention to them. As this book shows, these...