Here is his entry from the DSO book:
ROSS, CHARLES, Lieutenant, was born at Orange, New South Wales, the son of Scotch parents. He was educated at Santa Clara College, California, and became a Scout in the USA Service (Ness Percy, Indian War, 1877; Bannock, Indian War, 1878; Ute, Indian War, 1879). He was Chief of Scouts for Colonel Otter's Column in the North-Western Rebellion, Canada, in 1885, and was several times mentioned in Despatches. He had eight years' service in the North-West Mounted Police, Canada. In the South African War he served in Roberts's Horse as Lieutenant from January to April 1900, and was three times mentioned in Despatches. He served under General Hutton in command of the 1st MI Scouts from May to November 1900. Sir A Conan Doyle describes (page 529) in 'The Great Boer War' the campaign of January - April 1902. He tells us of a drive, sweeping backwards towards the Heilbron-Wolvehoek line, which ended in the total capture of 147 of the enemy, who were picked out of holes, retrieved from amid the reeds of the river, called down out of trees, or otherwise collected. So thorough was the operation, that it is recorded that the angle which formed the apex of the drive was one drove of game upon the last day, all the many types of antelope which form one of the characteristics and charms of the country having been herded into it. More important even than the results of the drive was the discovery of one of De Wet's arsenals in a cave in the Vrede district. Half-way down a precipitous krantz, with its mouth covered by creepers, no writer of romance could have imagined a more fitting headquarters for a guerrilla chief. The find was made by Ross's Canadian Scouts, who celebrated Dominion Day by this most useful achievement. Forty wagon-loads of ammunition and supplies were taken out of the cave". He was mentioned in Despatches, and for his services at Sanna's Post was created a Companion of the Distinguished Service Order [London Gazette, 19 April 1901]: "Charles Ross, Lieutenant, Roberts's Horse. In recognition of services during the operations in South Africa". The Insignia were presented to him by the Duke of Cornwall and York 14 August 1901. He was subsequently promoted to Major. Major Ross married, in 1889, Nellie Buchanan, a Canadian lady of Scotch descent.