If I'm reading it correctly, at March 1917, 19 Corps provided the Army Troops for Third Army.
As far as The Queen's go, this looks like the 4th and 10th Labour Companies, which, following the formation of the Labour Corps, would become the 112th and 118th Labour Companies respectively.
Two possible names:
Charles Ralph Calow, born March Qu. 1897, Camberwell
Charles Roy Calow, born June Qu. 1897, Darlington
The first one may have married quite young; to Violet Hardley, March Qu. 1916, Camberwell
The second one married Margaret Sanderson, Sept Qu 1924, Darlington
Phil