Group photo, RASC-AAVSO meeting at DDO, 1940. An Image map with names [5] is available. Frank Hogg appears in both photos!
Report & photo key: JRASC, 34, 224 [6].
Plate X [7] (left half of image above).
Links:
[1] http://www.rasc.ca/category/archivetags/1940
[2] http://www.rasc.ca/category/archivetags/aavso
[3] http://www.rasc.ca/category/archivetags/ddo
[4] http://www.rasc.ca/category/image-galleries/national-archives/archives-1940s-0
[5] http://www.rasc.ca/rasc-aavso-1940-meeting
[6] http://articles.adsabs.harvard.edu/full/seri/JRASC/0034//0000224.000.html
[7] http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?journal=JRASC&year=%3f%3f%3f%3f&volume=..34&letter=.&db_key=AST&page_ind=248&plate_select=NO&data_type=GIF&type=SCREEN_GIF&classic=YES