 Dunmore Lang was also involved with the short lived Riverina secession movement which was active in the 1860s. The movement was inspired by the success of the Victorian and Queensland secession movements and motivated by a desire to draw more public funds to the region and maintain the favourable land tenure the "squatter" pastoralists enjoyed. With the movement strongest in Deniliquin and Albury, Dunmore Lang, unrelated squatter and parliamentarian Gideon Lang and other influential pastoralists joined with local newspaper editors, George Mott and David Jones in the campaign. This culminated in presenting petitions to the Governor of New South Wales, Sir John Young and the Colonial Secretary, Edward Cardwell. Soon after the movement fell apart due to the differences between the squatters on one side and the small farmers and townspeople on the other causing its objectives to become obscured by other associated issues such as inter-colonial tariffs and rail links.
