agreed between the IPP and the Liberal Party. Some 130,000 tenants in arrears, who had been excluded from the rent-fixing authorised by the 1881 act, were given amnesty. In return, the IPP withdrew its support for agrarian agitation and cancelled the No Rent Manifesto, bringing an end to the Land League. Travels and marriage In June and July 1882, Davitt travelled to the United States on a lecture tour. Upon his return, Davitt toured Britain alongside Henry George in a campaign for land nationalisation and an alliance between the British working class, Irish labourers, and tenant farmers sponsored by the New York-based Irish World. Land nationalisation was extremely unpopular in Ireland, and strongly opposed by the IPP, which was becoming defined as a party for the interests of Irish tenant farmers. After a meeting with Parnell in September 1882, Davitt agreed to set aside his support for the cause and resume cooperation with the IPP as a founder of the new Irish National League. The League included a few of Davitt's ideas, but was dominated by a conservative faction loyal to Parnell and emphasised Home Rule rather than further land reform. In addition, Parnell agreed to support a new organisation, the Irish Labour and Industrial Union, which aimed to help rural labourers acquire land and the franchise. The union was later replaced by the Irish Democratic Trade and Labour Federation, over whose formation Davitt presided in 1890 with Michael Austin. This organisation was later subsumed into D. D. Sheehan's Irish Land and Labour Association in 1894. With the demise of the Land League, agitation continued to be carried on by more extreme physical-force factions, such as the Fenian dynamite campaign, while the British government continued its crackdown. Davitt denounced both the bombings and the British government's excesses. As a result, he was arrested for sedition in February 1883 and served four months in jail, his last term in prison. Believing that the Plan of Campaign—renewed agrarian agitation between 1886 and 1891—was against the Kilmainham Treaty, Davitt acceded to Parnell's request and did not involve himself in it. Davitt was a frequent visitor to Scotland, and became closely associated with the crofters' struggles in the Highlands and Islands. He urged the Irish immigrant population to integrate into the politics of their adopted country and in particular the infant Labour movement. Davitt worked closely with John Ferguson, the Irish leader in Glasgow