RootsChat.Com

 Not sure about this but...Wonder if they meant to write Railway Express Man?
   Looked after the transportation & safety of luggage, parcels & imports on trains. Sometimes even picking them up & even taking them to their destination addresses... Sounds rather like the express parcel post deliveries today.
  Adding...I see a young William if that is your man, in the 1911 census Blackpool, Fylde, Lancashire- a railway goods porter...which sounds similar in job terms but his later work being of more importance.

  (Margaret) Ruth & Gordon's obits can be found online... Here is a site with detail on her husband's life. Margaret had a brother in Mb. as well!!!
   Also the mention of Harvesters flocking to the grain-growing Provinces is likely Alexander Cook's story as well. He & his fellow passengers had probably either read the call for farm help needed in Canada at harvest time or the free land grants available here! (Unfortunately, the sad part of the story is that it had all been taken away from the aboriginal & metis population)
https://www.genealogy.com/ftm/h/e/n/John-G-Hendrikson/GENE12-0009.html

  Wow, nice quick work of that! Big pat on the back, Rootschatters.
Not sure if the posters are the same person, but to link to a much earlier post re: his parents
https://www.rootschat.com/forum/index.php?topic=797278

The Tombstone image for Rosie's reply http://www.rootschat.com/links/01srl/

Nice finds Eileen, He didn't give up his imm. dates on census ! Tazzy, sorry...Saskatchewan unfortunately does not have marriages online.

1911 Census - Moose Jaw Sub-Districts 16-99, Saskatchewan, Canada
  Alexander Cook  Birth Date   Apr 1887   Scotland Single   Religion Presbyterian
  Farm Labourer in household of Horatio Hazelwood Kemp
  https://www.familysearch.org/ark:/61903/3:1:3QS7-898W-3L65?i=69&cc=2143998

1916 Farming near Maple Creek
  Alexand(ra) c.1887 Scotland     Barbara c. 1886 Scotland    2 mo. old Baby J. Elizabeth
  https://recherche-collection-search.bac-lac.gc.ca/eng/home/record?app=census&IdNumber=43362510

  Elizabeth Jean Cook b. May 29, 1916 
  Place of Birth: 26 22 25 3   
  Mother BARBRA JANE ROBB
  Father ALEXANDER COOK

 Elsie Iasbel Cook Aug 20 1917
  Place of Birth: MooseJaw.
  Mother BARBARA JEAN ROBB
  Father ALEXANDER COOK

adding: He applied for 2 Land Grants... Note the section of land from Elizabeth Jean's birth
http://www.rootschat.com/links/01srk/

With some Thomas ancestors also naming sons Thomas, it made for some confusion. I have noted while searching for others...that it may also have confused those children when Momma called the father, or visa versa..so sometimes the father's middle names were used. Having said that, things can also be harder to prove, as sometimes actual forenames were used on important documents.

Ann Tough c. 1762 (on 1841 census) There's a Kildrummy birth Father James
   https://www.familysearch.org/ark:/61903/1:1:XYXJ-STL

a George Horn & Jannet Esselmont Married 9 Aug.1737 Tarves, Aberdeen, Scotland
 Father: George Horn
   a James Horn Chr: 30 Mar 1742 Tarves, Aberdeen, Scotland
   but also a Chr: 21 October 1754 Tarves, Aberdeen, Scotland
    info posted on Family search but no trees were put together
    http://www.rootschat.com/links/01sri/
There's also births further afield in Methlick, who may be related as well.

Tarves, Aberdeenshire Cemetery
Perhaps the son George b. 1797  https://www.findagrave.com/memorial/149090684/george-horne
    https://www.wikitree.com/wiki/Horn-6193
 Maybe you can work together to find more!
Wife Harriet enumerated as "widow" Horn in 1851 Aberdeenshire Tarves running Crofter Farms
 https://www.freecen.org.uk/search_records/590266dfe9379091b1cabbdf

Monument in Tarves Cemetery, in case a sister or other rellie
A Barbara Tough born c. 1767 married a Charles Florence / son Charles
https://images.findagrave.com/photos/2015/191/149086138_1436667997.jpg