The author's attitude to war and the moral implications of diplomacy became sharper in "Judas" (1939), which explores the concepts of loyalty and treachery amid a strong indictment of the desertion of Czechoslovakia by Britain and France in the name of appeasement. The worsening international situation led to expansion of the Territorial Army (TA). It was decided to raise new units of anti-aircraft and coastal artillery in the Orkneys to defend the Scapa Flow naval base, with a fortress company of the Royal Engineers to support them. The Lord Lieutenant of Orkney and Shetland asked Linklater, still a Reserve officer, to raise one of these units, and he chose the 'Sappers'. He was commissioned as Captain and second-in-command of the Orkney Fortress Royal Engineers on 16 September 1938, but was effective commander. The unit consisted of a single company headquartered at Kirkwall, mainly to operate the electrical generators for the Scapa Flow defences and man the searchlights for the guns. The men were called out from farms and villages shortly before the outbreak of World War II and served through the winter of 1939/1940, when Orkney received a number of "Luftwaffe" raids. By mid-1940 reinforcements were pouring into the Orkney and Shetland defences and Linklater's command was broken up.