I have found a bit more on John James Corrin- to add to the - NZ Gazette 1917, p.139, Military Call Up – that Sue, found for you.

New Zealand Army WWI. Nominal Rolls, 1914-1918.
Name: John James Corrin.
Regimental Number: 48704.
Relative Name: J E Corrin.
Relative Relationship: Father.
Embarkation: 1917.
Source Citation: Nominal Rolls: Vol. 3: 1 Jan 1917 - 31 Dec 1917.

Roll No. 62.
Last Entry on page.

Regiment – J Company. Corrin, John James, Grocer. ..... J. E. Corrin (father), FOXDALE, Isle of Man.

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New Zealand Army WWI Nominal Rolls, 1914-1918.

Averil