There was a Ludvig Fossheim who filed for a land grant in July 1917, a bit NE of Edson. Thoralf also applied for a land grant in that area.
http://abgensoc.ca/homestead/search.php?_mode=search&SUR... Ludvig Fossheim, b 1888, enlisted in the Canadian Expeditionary Forces in December 1917. He gave his home as Yates, which was a bit NE of Edson. Also note he named his birthplace & next of kin in Norway.
http://www.collectionscanada.gc.ca/databases/cef/001042-119.... It’s my guess that Thoralf went to connect with that Ludvig.
Edson is located in Yellowhead County, AB. Here’s a map. These gents’ homesteads were located approximately where the line goes down between columns 17 & 16 and rows 54.
http://www.rootsweb.ancestry.com/~abarchiv/yellowhead/yhne.j... The photo on the bottom left of this page includes Elmer & Irene Fossheim.
http://www.ourfutureourpast.ca/loc_hist/page.aspx?id=4213202 I also did a search for the terms Fossheim & Edson. Should be able to contact one of those folks who might know more.
http://www.google.com/search?q=fossheim+edson&ie=utf-8&a... Do follow up with Peter's suggestion about contacting the Alberta Genealogical Society.