In 1915 Montreal Transportation Co. received an offer to buy her for $80,000 by the Marine Transport Service Corp. of New York City, but the possible sale fell through. ROSEMOUNT was chartered to Nova Scotia Steel and Coal for the Sydney Nova Scotia-St. Lawrence traffic in 1915 @ $5,750 per month. She could be sent as far as Saint John New Brunswick for $500 more. She went aground with $2,000 damage off Lotbiniere Quebec on 9 July 1915 while on passage from Montreal to Sydney. She was aground again on 7 October 1915 at Knapp's Point (also reported as Brophy's Point) on Wolfe Island Ontario while on passage from Fort William Ontario to Montréal. Knapp's Point was the location of the lighthouse; Brophy's Point is next to it. The light's location was also commonly referred to as Brown's Point. The most correct location of the grounding could not be determined. Because of the accident, she went to the nearby Kingston Dry Dock with 44 damaged plates and needing new propeller blades. In December 1915 Inter-American Steamship Co. of New York City chartered her @ $7,000 a month. In 1916 she was chartered to go to the West Indies for Inter-American @ $15,000 per month for the round trip and in July 1916 she was chartered to Inter-American for 4 months @ $18,500 per month. The steamer was then sold to the French Government for $297,303.71 with delivery to be on 4 January 1917. Her Canadian registry was cancelled on 13 January 1917. She was put under the management of Compagnie Generale Transatlantique (The French Line), registered at Le Havre France and renamed AUBE. Sometime after the war she was laid up at St. Nazaire France before coming back to Canadian registry in late 1922 under the ownership of Canada Steamship Lines. They named her ROSEMOUNT again but Aube Steamship Co. of Montreal soon bought her and changed her name back to AUBE. D.H. Mapes Jr. was her manager 1923-24, Mapes & Ferdon were her managers 1925-30. She was aground off Carleton Island (near Cape Vincent New York) in the St. Lawrence on 25 September 1922 and was repaired at Kingston in 1923-24. She grounded in the Brockville Ontario Narrows in 1926 and was again repaired in the Kingston Dry Dock. She was in collision with a Porter Construction scow in the Welland Canal in 1928. The scow sank. AUBE was once again repaired in the Kingston Dry Dock. She suffered storm damage in June 1930 and was yet again repaired at Kingston. She was laid up at Lachine Quebec on 18 July 1930 but was reactivated for the 1931 season. She grounded twice on her last trip down of the season in 1931. Her owner was bankrupt so she was laid up at Lachine again in December 1931. In 1932 her ownership was transferred to Sin-Mac tugs to pay a debt of $2,800 although the List of Shipping showed her 1932 owner as Aube Steamship Co. and her 1933 owner as Canadian Trust Co. She was shown in the List of Shipping 1934 and 1935 as a barge owned by Sin-Mac. She was laid up and finally 74