He is mentioned in "The Emperor's Irish Slaves", by Robert Widders:
Sergeant Harry Smith (Royal Naval Dockyard Police) and his son Signalman N. L. Smith (HKVDC) were both captured and imprisoned. Sergeant Smith later dies in a POW camp in Japan. Sergeant Smith's wife and daughter escaped internment by the Japanese as they were Irish. They continued living in their house in Fung Fai Terrace, assisted by the International Red Cross. Mrs Smith eventually died from cancer. Her daughter Muriel, married to Bill Cameron, a policeman interned in the civilian camp in Stanley, remained at large.
However, Henry Ching believes this information is based on his assumptions, that later turned out to be incorrect. Henry writes: "I assumed that it was Sgt Harry Smith, and this assumption found its way into a book written by Robert Widders entitled "The Emperor's Irish Slaves". But Tony ((Banham)) subsequently received a letter from a descendant of Harry Smith which said that Smith married a Chinese woman. The Mrs Smith I knew was certainly not Chinese."
On page 181 of Tony Banham's book, "We shall suffer there", he notes that Harry Smith, Sergeant, HKDDC RN/DYP, died on 9th August, 1944 in Japan.