Hi Adrian, You didn't provide birth or death date so I'm not sure I found the correct person.
A Mary N. Fowler Born=2 May 1861 Died=7 June 1935, Pocatello, Bannock Co. per death cert #094087. Source=Idaho Death Index 1911-51.
If this is your Mary, there is an obituary volunteer at Random Acts Genealogical Kindness. Go to raogk.org Read guidelines Choose Idaho Choose A Thru E Scroll down to Bannock Co and choose Thomas. Successful Searching!