Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Tenant Right League, established in 1850, was an organisation which aimed to secure reforms in the Irish land system. Formed by Charles Gavan Duffy and Frederick Lucas , it united for a time Protestant and Catholic tenants, Duffy calling his movement The League of North and South. The political background to the movement was the Encumbered Estates Act and the resultant change in land ownership at landlord level. In the North of Ireland, Protestant and Presbyterian ministers feared that the new landlords would destroy the "Ulster custom" of tenancy, which compensated tenants for any improvement undertaken. Concurrently, in the South of Ireland politically minded young Catholic priests were agitating for the adoption there of the Ulster custom as a measure of reform.