Clarence was born at Penetanguishene in 1838. Also known as William, Clarence became a civil engineer and was for many years Chief Engineer of the Northern Railway of Canada, from Toronto to Collingwood. He resigned from this position in 1875, to become the contractor of the Northern Extensions Railway to Gravenhurst. Following its completion later that year, he became Chief Engineer of the Ontario & Pacific Junction Railway, which proposed to build a connection from there to the proposed CPR. The O & P J was never built. Clarence W. Moberly died in Collingwood in 1902.