A doctor, astronomer, editor, poet and psychical researcher, Watson was born on 8 January 1859 in Dixie, Canada West (now Ontario), and was the son of William Youle Watson and Mary Ann Aldred. On 23 September 1885 he married Sarah Anne Grimshaw Clare (1861-1937), the daughter of Samuel Clare, in Toronto. They had seven children (two daughters and five sons). Watson died in Toronto on 3 May 1926.

He graduated from Victoria University, and Edinburgh University. He practiced medicine for more than thirty years in the city of Toronto.

He held a series of seances from 1918 to 1920 by medium Louis Benjamin.

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