Advantage was taken of the liberal provisions of the Pastoral Leases Act of 1869, to take up unoccupied country, even if it was dry. Cattle were selling on the Palmer diggings at £10 and £12 a head cash, and the supply of bullocks was not equal to the demand, because the runs had been so thinned by the exodus of stock south to clear expenses, that no surplus was available to meet such a sudden demand as that caused by the arrival of 20,000 diggers in the north. Then the tide flowed again, and became the flood that helped to fill the country with work and life. Cattle came out in large numbers, and passed on to occupy country in the northern territory of South Australia, and even in Western Australia. As many as 30,000 head passed over the border in one year at Burketown, for the purpose of stocking country around Port Darwin. For several years travelling stock went out to the far north-west, and all had to pass through the Gulf country. The route followed from the borders of Queensland was by the track that Leichhardt took on his journey to Port Essington, between the tableland and salt water, crossing the Macarthur, Roper, Calvert, and other rivers. Stations were occupied on the Orde and Victoria Rivers on the Cambridge Gulf side with stock from North Queensland. In those districts some very fine open downs country had recently been discovered. Fisher and Lyons had 20,000 head of cattle sent out to their country in the north-west. Osman and Panton also had large numbers of cattle from Queensland. Dr. Brown is reported to have expended £100,000 is sending sheep and cattle from the Adelaide side to the northern territory. The stocking of this far away country was extremely expensive owing to the distance the cattle had to travel, and the unusually high percentage of losses on the way. Some of the stock were two years on the road, and a new disease called red water attacked them when passing the Roper River. This disease is supposed to be due to cattle ticks (Ixodes Bovis), and has since carried disaster into many herds in Queensland. The average cost of some of the cattle when arrived on their country was equal to £7 a head, in consequence of losses and expenses. The Gordon Brothers were among the early drovers to take stock over the borders to West Australia, and they made several trips. The Duracks are another family of pioneer settlers in the northern territory, and held extensive possessions. The country bordering the rivers that flow into the Cambridge Gulf was reported to be of a superior description and of a fattening nature. Though much of the country in the northern territory was reckoned of an inferior description for grazing, the encouraging terms of leasing offered by the South Australian Government induced many to venture on the hazardous undertaking. The markets opened up by the goldfields of Port Darwin repaid some of their enterprise. Bullocks were sold at from £17 to £20 cash for butchering purposes.