Sons of Kenneth Samuel EMPSON and Venus HARDY who married in Kings Lynn registration district in December quarter 1879.

In 1901 Arthur is living in Winnipeg, Manitoba, and the Canadian census says that he arrived in Canada in 1897. Born 1883.
In 1911, he's in the district of Kootenay, British Columbia. Born 1883.

Harry's occupation in his Canadian Attestion is given as cook, so he's probably the baker, aged 17, who sailed to New York on board the Germanic on 6 August 1904.
In the US 1910 census he's living in the town of Warden, county of Grant, in the state of Washington; occupation cook.

Arthur and Harry both joined the Canadian army in WW1.

https://recherche-collection-search....rthur%20empson

https://recherche-collection-search....79468&q=empson

It would seem Harry died 1 March 1917.
https://www.cwgc.org/find-records/fi.../harry-empson/