| Regimental number | 9/1209 |
| Date of birth | |
| Place of birth | Scotland |
| Religion | Presbyterian |
| Occupation | Journalist and newspaper proprietor |
| Address | Balclutha |
| Marital status | Married |
| Next of kin | Wife, Mrs W S Pennycook, Balclutha |
| Rank on embarkation | Captain |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, Otago Mounted Rifles Regiment, 6th Reinforcement |
| Embarkation details | Unit embarked from Wellington on board HMNZT 28 Tofua on |
| Final rank | Lieutenant Colonel |
| Final unit | 2nd Battalion, Otago Infantry Regiment |
| Recommendations (Medals and Awards) |
Mention in Despatches 'For good work and devotion to duty during the period August 28th/October 1916. During the above period Major Pennycook was in command of "D" Company NZ Pioneers and his constant supervision of the work of his Company combined with his judgement and skill in laying out the work were the principal factors in the good work done by his Company.' Awarded, and promulgated, 'London Gazette', 4 January 1917. |
| Fate | Killed in Action |
| Place of burial | Grevillers British Cemetery (Plot VII, Row AA, Grave No 3), France |
| Miscellaneous information from cemetery records | Wife: Margaret J. Pennycook, The Neuk, Coupar Angus, Scotland |
| Other details |
War service: Egypt, Western Front Reported wounded in action, 15 February 1917 (gun shot wound, left arm); admitted to 7th Stationary Hospital, Boulogne, 20 February 1917; transferred to England, 20 February 1917, and admitted to 1st London General Hospital, 22 February 1917. Admitted to No 1 NZ General Hospital, Brockenhurst, 15 May 1917; placed on NZ Roll on account of ill health caused by wounds. Taken off NZ Roll, 16 July 1917, and appointed second in command, NZ Convalescent Hospital, Hornchurch. Transferred to Otago Infantry Regiment, 15 November 1917; taken on strength, 2nd Bn, 20 August 1918. KIlled in action, 24 August 1918. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Miscellaneous details | Nominal Roll Vol. 1: Otago Mounted Rifles/Sixth. Surname entered on Nominal Roll as PENNYCOCK. |