That does explain why Archie's record is in 'a bit of a state' - and some of the writing almost impossible to read...

Will have another try

Bit more info:

His Chest Girth is 35" : range of expansion 2.15

He was in France 10 July 1918 until 13 January 1919 (118 days)

Next to the Heading: Wounded -

Can just about make out the first word as 'Gas'