Series consists of an annotated Ontario Department of Mines Certificate of Mine Rescue Training issued to J.H. Heit of Falconbridge, Ontario in June 1948 by Chief Inspector of Mines W.O. Tower and Superintendant of Rescue Station G.G. McPhail. The certificate signified the completion of mine rescue apparatus training at the Sudbury Rescue Station. Training included hard labour in noxious and irrespirable gases and the participant was required to give evidence of being qualified to care for and use rescue apparatuses in mines (basic training). This certificate includes three seals signifying completion of additional training; The Standard Mine Rescue Training seal (in the colour red) dated 1949 and signed by Rescue Station Superintendent G.G. McPhail, the Advanced Mine Rescue Training seal (in a gold) dated 1951 and signed by Inspector of Rescue Training P.C. Smith, and the Supervisory Advanced Mine Rescue Training seal (in gold) dated 1961 and signed by Inspector of Rescue Training G.G. McPhail.