One silver case (wooden box) Horrocks Officer's Mess 1952-53 from Colonel Blair. POSSIBLE EXPLANATION FOR "WOODEN BOX - HORROCKS" - FROM WIKIPEDIA Sir William Heaton Horrocks KCMG, CB (25 August 1859 – 26 January 1941) was an officer of the British Army remembered chiefly for confirming Sir David Bruce's theory that Malta fever was spread through goat's milk. He also contributed to the making safe of water, developing a simple method of testing and purifying water in the field. Because of his work, he became the first Director of Hygiene at the War Office in 1919. Horrocks also developed the "Horrocks Box", following his research into contamination of water. This device used sand filtration and chlorine sterilisation plants to provide a portable means of decontaminating water supplies. It proved of particular use during the First World War, when it kept the Allied forces largely free of water-borne disease. In addition to this he also developed means of removing poisons from water and assisted in the design of the first gas mask.