Virginia Woolfs many novels, notably Night and Day (1919), Jacobs Room (1922), Mrs Dalloway (1925), To the Lighthouse (1927) and The Waves (1931), transformed ideas about structure, plot and characterisation. The third child of Leslie and Julia Stephen, and sister of Vanessa (later Bell), Woolf was a central figure in the Bloomsbury Group: that union of friends who revolutionised British culture with their innovative approach to art, design and society in the early years of the twentieth century. Portraiture figured greatly in Woolfs life. Portraits by G.F. Watts and photographs made by her aunt, Julia Margaret Cameron, furnished rooms in which she lived. Written portraits were produced in the family home; her father, Leslie Stephen, published short biographies of Samuel Johnson, Pope, Swift, George Eliot and Thomas Hobbes, while editing the first twenty-six volumes of the Dictionary of National Biography.