L to R: J.A. Partridge, Dr. Wm. Findlay, Dr. Warren, Rev. E.F. Maunsell, Norman H. Broadhead, Prof. George Milne, George Campbell, 8, Dr. McNeil, T.N. Wingham, W.S. Mallory, Dr. A.E. Johns, E.E. Boscence.
Spring 1940 was the first occasion the American Association of Variable Star Observers held their meetings outside of the United States. The meetings were held at the University of Toronto, and included a paper session at the David Dunlap Observatory and a garden party (by special invitation) at Don Alda Farm hosted by Mrs. Dunlap. The meetings concluded with a formal dinner in the Great Hall of Hart House jointly hosted by the AAVSO and the RASC.
This is none other than Frank Scott Hogg, Ph.D. (Harvard), Professor of Astronomy, etc, etc, and also the husband of Helen Hogg. I am sure you can find an obituary in the Journal [JRASC 45,1]. Frank had a weak heart and died prematurely in 1949, I believe -- otherwise he would have been the third Director of DDO. It is a good picture of him, showing his piercing but firendly eyes.
Photo by R. Northcott, Nov. 1950. Note by D.A. MacRae, 1998.