Born on Rondeau Point, in New Scotland, Ontario, he was the son of John and Janey (McIntyre) McKishnie and the brother of the Canadian poet, Jean Blewett.
His first novel, Gaff Linkum, set in Kent County, Ontario, was published in 1907. In 1910, McKishnie relocated to Toronto and became the dramatic editor of the Toronto Sunday World. He was the director of the short story writing program at Shaw school in Toronto. His short stories regularly appeared in Maclean’s Magazine. Many of his stories featured a Black constable named Lennox Ballister. The first Lennox Ballister story was printed in Maclean’s in July 1918.
McKishnie’s books can be described as historical fiction, romance, nature stories, humor, adventure, and juvenile stories. He was the author of the following books:
• Gaff Linkum. A Tale of Talbotville. Toronto: Briggs. 1907. 255 p.
• Love of the Wild. Toronto: McLeod & Allen, 1910. 327 p.
• Willow, the Wisp. Toronto: Allen, 1918. 308 p.
• A Son of Courage. Toronto: Allen, 1920, 284 p.
• Big John Wallace. A Romance of the Early Canadian Pioneers. Toronto: Massey-Harris Press, 1922. 47 p.
• Openway. Toronto: Musson, 1922. 233 p.
• Mates of the Tangle. Toronto: Musson, 1924. 247 p.
• Brains, Limited. Toronto: Allen, 1925. 287 p.
• Dwellers of the Marsh Realm. Chicago: Donohue, 1937. 79 p.
