| Regimental number | 39145 |
| Place of birth | Dunrobin, Otago |
| Religion | Presbyterian |
| Occupation | Farmer |
| Marital status | Single |
| Age at embarkation | 34 |
| Height | 5' 10" |
| Weight | 136 lbs |
| Next of kin | Brother, J Waddell Barclay, Dunrobin, Otago |
| Previous military service | Served for 7 years in the Kelso Mounted Rifles Regiment; resigned; not serving in any military unit at time of NZEF enlistment. |
| Enlistment date | |
| Place of enlistment | Milton |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 22nd Reinforcements, Otago Infantry Regiment, D Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 76 Aparima on |
| Final rank | Private |
| Final unit | 1st Battalion, Otago Infantry Regiment |
| Fate | Killed in Action |
| Age at death from cemetery records | 35 |
| Place of burial | No known grave |
| Commemoration details | Tyne Cot Memorial (New Zealand Apse, Panel 3), Zonnebeke, Belgium |
| Miscellaneous information from cemetery records | Parents: the late Lawrence and Marion Waddell Barclay (both b. Scotland) |
| Other details |
War service: Western Front Embarked Wellington, 16 February 1917; disembarked Devonport, England, 2 May 1917, and marched into Sling Camp. Proceeded overseas to France, 6 June 1917; joined 1st Bn, Otago Infantry Regiment, in the field, 25 June 1917, and posted to 14th Company. Admitted to No 1 NZ Field Ambulance, 18 July 1917 (piles); rejoined Bnm 27 July 1917. Killed in action, 12 October 1917. Medals: British War Medal, Victory Medal |
| Sources | Nominal Roll Vol. 3: Roll 55, p. 13 Archives New Zealand (Wellington), Agency AABK, Series 18805, File 22275546 |