Ivor A. Mast
	
Constable Ivor Mast was the RCMP officer stationed at Mayo for at least 1945 to 1947, and probably manned the station through to 1950. The Mayo detachment was in the Mervyn residence, purchased at some point from James Mervyn by Martha Noel Mast, and used by the Police from 1936 to the early 1950s. In April 1946, Constable Mast was called to Jim Mervyn’s Chateau Mayo Hotel where Peter Nord had shot George Potter over a mining claims dispute.((Linda E.T. MacDonald and Lynette R. Bleiler, //Gold & Galena.// Mayo Historical Society, 1990: 118-122.))

Ivor and Martha Mast bought what became known as the historic Mast House in Whitehorse in 1961. At that time, it was located at 209 Elliot Street. After his discharge from the RCMP, Mast became an agent for Explosives Ltd. with its office located in the Mast House. Their explosives magazine was out of town. The Masts owned the house until 1985 when they moved south.((Shelagh and Colin Beairsto, Yukon Historical and Museums Association, Submission to the City of Whitehorse, “Preservation of the Doctor’s House aka The Mast House,” 21 February 1998.))