He arrived in Canada in late 1925, and lived in Ontario, where "both he and his brother Charles, a talented portrait painter, exhibited in the 1925 Ontario Society of Artists annual exhibition. ... MacGregor’s two paintings Meditation and Memories were offered for sale at $250 and $200 respectively."

MacGregor moved to the West Coast, where he exhibited with the Island Arts and Crafts Society in their 1927 annual exhibition, showing an oil portrait of Betty (Bette) Weston, the daughter of W.P. Weston.

MacGregor exhibited with the B.C. Society of Fine Arts in 1927, 1936, and 1937.

He exhibited his work in the B.C. Artists annuals at the Vancouver Art Gallery in 1937 and 1938.

MacGregor returned to Ontario, where he lived in Ottawa and was the Director of the Gatineau Summer School of Painting, working with Goodridge Roberts. He moved to the Toronto area, where in the late 1950s he became involved with an art dealer for whom he painted canvasses in the style of well-known eastern Canadian artists. This work later got him involved in a criminal prosecution of the dealer in 1962, who went to prison. MacGregor was a Crown witness and was not charged for his work (see online article Brush With Infamy).

MacGregor died in Toronto ON in 1979.

GROUP EXHIBITIONS

DATE	EXHIBITION	ARTWORK
1927 June 10 - 25	BCSFA   19th Annual Exhibition	Miss Ethel Lougheed
		Mrs. H. Hood
		Miss Betty Weston
		A Fairy Glen
1936 June 26 - July 12	BCSFA   26th Annual	Portrait, H. Hood
1937 April 16 - May 1	BCSFA   27th Annual	Young Girl
1937 Sept. 17 - Oct. 10	VAG   B.C. Artists 6th Annual	Head Study
1938 Sept. 16 - Oct. 9	VAG   B.C. Artists 7th Annual	A.M. Stephen, Poet and Author

References

ROYAL CANADIAN ACADEMY OF ARTS - EXHIBITIONS & MEMBERS 1880 - 1979 (refer to RCA81)

BIOGRAPHICAL INDEX OF ARTISTS IN CANADA (refer to BIAC03)
      1 reference cited for MacGregor.

ARTISTS IN CANADA (refer to AIC)

https://reviewcanada.ca/magazine/2017/07/brush-with-infamy/

https://en.wikipedia.org/wiki/William_Firth_MacGregor

Clippings