His name is listed as FISHER, Walter - [a.k.a. ERICSON, Walter] on Archway and as Walter Ericson on the Nominal Roll

Embarked Wellington, 16 July 1917; disembarked Liverpool, England, 16 September 1917; posted to 4th Otago Reserve Bn, Sling Camp, 17 September 1917.
Proceeded overseas to France, 26 October 1917; posted to 3rd Bn, Otago Infantry Regiment, 9 November 1917.
Admitted to 7th General Hospital, St Omer, 15 November 1917 (German measles: mild); discharged to NZ Base Depot, Etaples, 26 November 1917.
Admitted to 24th General Hospital, Etaples, 7 December 1917 (laryngitis); transferred to No 1 Convalescent Depot, Etaples,1 January 1918; to No 6 Convalescent Depot and thence to No 5 Convalescent Depot, 4 January 1918; discharged to NZ Base Depot, Etaples, 16 January 1918.
Admitted to 24th General Hospital, 21 January 1918 (bronchitis, catarrh: mild); transferred to No 6 Convalescent Depot, 7 February 1918; to 5th Convalescent Depot, 14 February 1918; discharged to Base Depot, 8 March 1918.
Attached to NZ Base Depot, 22 March 1918.
Joined 2nd Entrenching Bn, 11 June 1918.
Rejoined Bn from Base Depot, 23 July 1918.
On leave to United Kingdom, 1 September 1918; rejoined unit from leave, 17 September 1918.
Declared by Statutory Declaration, Thilloy, 8 October 1918, that his correct name was Walter Fisher, by which name he would in future be known.
Posted to strength of 1st NZ (Divisional) Employment Company from NZ Entrenchment Group, 26 October 1918.
Marched into Sling Camp, England, from France, 22 December 1918.
Commenced return to New Zealand on board HT 'Ajana', 7 February 1919; admitted to ship's hospital at sea, 14 March 1919 (mumps); date of discharge from ship's hospital not recorded; discharged, 28 April 1919.
Total war service: 1 year 343 days (of which 1 year 243 days was abroad)

Parents: Walter and Mary Ericson (both b. New Zealand) AWMM