Forfarian,
You and I have known each other for probably close to if not over 20 years, have you ever known me not use SP? I have them all except for Henry's marriage and death. Including the US, SK/CA and now South African records. And yes they are all their children, even the pre martial accident.
Williamina 1866 d 1866 at 11 days and 2 months before her parents married.
Henry Lockie 1867 -
Alice Ann 1869 - 1957 Glasgow
Georgina Gibson 1872 - 1950 RM 493 (Rozilee aka Shellbrook SK)
Margaret 1874 - 1907 Grand Rapids, MI
William 1878 - 1936 Heidelberg, Transvaal South Africa
Helen Moir 1880 - 1960 Prince Albert, SK
Frederick 1885 - 1935 RM 493
James Alexander 1888 - 1917 WWI France.
Arthur Irvine 1891 - 1977 Edmonton, AB
Henry is not in the USA the three who looked promising I managed to trace back and eliminated; those in NZ arrived prior to 1901; Oz not there and definitely not in Canada. Not sure about Ireland, I find it a challenge to find my way around but working on it.
I have augmented searches using British Newspaper Archives, other newspaper archives, Ancestry/FindMyPast for military as well as the British Archives. As for his marriage...every possible "J" as a spouse in SP to a Henry. And before I forget these searches also included the given name "Harry."
There is a Henry (not related) in the neighboring parish. That family was also engaged in construction but in a much larger scale. BNA has many articles on both families.
And, father William died 1910 RM 493 buried Wild Rose North Cemetery Hoblein. SK
Mother died 1938 buried same next to William, her stone doesn't include him as his is on his cover which was the typical burial method of his era.
Don