major barrier was the free trade policies of New South Wales which conflicted with the protectionist policies dominant in Victoria and most of the other colonies. Nevertheless, the NSW premier Henry Parkes was a strong advocate of federation and his Tenterfield Oration in 1889 was pivotal in gathering support for the cause. Parkes also struck a deal with Edmund Barton, leader of the NSW Protectionist Party, whereby they would work together for federation and leave the question of a protective tariff for a future Australian government to decide. In 1890, representatives of the six colonies and New Zealand met in Melbourne and agreed in principle to a federation of the colonies and for the colonial legislatures to nominate representatives to attend a constitutional convention. The following year, the National Australasian Convention was held in Sydney, with all the future states and New Zealand represented. A draft constitutional Bill was adopted and transmitted to the colonial parliaments for approval by the people. The worsening economic depression and parliamentary opposition, however, delayed progress. In early 1893 the first citizens' Federation League was established in the Riverina region of New South Wales and many other leagues were soon formed in the colonies. The leagues organised a conference in Corowa in July 1893 which developed a new plan for federation involving a constitutional convention with directly elected delegates and a referendum in each colony to endorse the proposed constitution. The new NSW premier, George Reid, endorsed the "Corowa plan" and in 1895 convinced the majority of other premiers to adopt it. Most of the colonies sent directly elected representatives to the constitutional convention, although those of Western Australia were chosen by its parliament. Queensland did not send delegates. The convention held sessions in 1897 and 1898 which resulted in a proposed constitution for a Commonwealth of federated states under the British Crown. Referendums held in 1898 resulted in solid majorities for the constitution in Victoria, South Australia and Tasmania. However, the referendum failed to gain the required majority in New South Wales after that colony's Labor Party campaigned against it and premier Reid gave it such qualified support that he earned the nickname "yes-no Reid". The premiers of the other colonies agreed to a number of concessions to New South Wales (particularly that the future Commonwealth capital would be located in that state), and in 1899 further referendums were held in all the colonies