His citation in The London Gazette reads: On the 26th December, 1899, during the fight at Game Tree, near Mafeking, when the order to retire had been given, Sergeant Martineau stopped and picked up Corporal Le Camp, who had been struck down about 10 yards from the Boer trenches, and half dragged, half carried, him towards a bush about 150 yards from the trenches.

[1]After the War Martineau took up employment with the African Boating Company in Durban, specialising in support to military forces.

He joined the Durban Militia Reserve in 1903 attaining the rank of Captain before visiting New Zealand in 1914 when the First World War broke out.

After recovering he was visiting the Kursaal (public area of the town) in Alexandria on the evening of 17 September 1915, where in a cafe called the Pallotta Court he met Captain Hunt and Lieutenant King of the Royal Army Medical Corps.

[3] While waiting for a verdict on his future Martineau once again fell ill and was admitted to No.2 Australian General Hospital at Ghezireh on 1 November with Colitis (inflammation of the gastrointestinal system).

On 24 February 1916 the New Zealand Gazette issued an order under the authority of James Allen the Minister for Defence: Lieutenant Horace Robert Martineau, V.C., attached to 14th (South Otago) Regiment is struck off the strength of the N.Z.