home from 1870 to 1894 was at 122 Regent's Park Road. In October 1894 he moved to 41 Regent's Park Road, Primrose Hill, NW1, where he died the following year. Marx's first London residence was a cramped apartment at 28 Dean Street, Soho. From 1856, he lived at 9 Grafton Terrace, Kentish Town, and then in a tenement at 41 Maitland Park Road in Belsize Park from 1875 until his death in March 1883. Mary Burns suddenly died of heart disease in 1863, after which Engels became close with her younger sister Lydia ("Lizzie"). They lived openly as a couple in London and married on 11 September 1878, hours before Lizzie's death. Later years Later in their life, both Marx and Engels came to argue that in some countries workers might be able to achieve their aims through peaceful means. In following this, Engels argued that socialists were evolutionists, although they remained committed to social revolution. Similarly, Tristram Hunt argues that Engels was sceptical of "top-down revolutions" and later in life advocated "a peaceful, democratic road to socialism". Engels also wrote in his introduction to the 1891 edition of Marx's The Class Struggles in France that "rebellion in the old style, street fighting with barricades, which decided the issue everywhere up to 1848, was to a considerable extent obsolete", although some such as David W. Lowell empashised their cautionary and tactical meaning, arguing that "Engels questions only rebellion 'in the old style', that is, insurrection: he does not renounce revolution. The reason for Engels' caution is clear: he candidly admits that ultimate victory for any insurrection is rare, simply on military and tactical grounds". In his introduction to the 1895 edition of Marx's The Class Struggles in France, Engels attempted to resolve the division between reformists and revolutionaries in the Marxist movement by declaring that he was in favour of short-term tactics of electoral politics that included gradualist and evolutionary socialist measures while maintaining his belief that revolutionary seizure of power by the proletariat should remain a goal. In spite of this attempt by Engels to merge gradualism and revolution, his effort only diluted the distinction of gradualism and revolution and had the effect of strengthening the position of the revisionists. Engels's statements in the French newspaper Le Figaro, in which he wrote that "revolution" and the "so-called socialist society" were not fixed concepts, but rather constantly changing social phenomena,