Military Exercise, Devonshire

Lamb served as a medical officer in the First World War, serving in France, Macedonia, and Palestine. During his service he was gassed. He was presented the Military Cross for his service. In World War 2 he served as an official war artist and produced many works of soldiers and military attaches. Following his marriage in 1906 he established himself as a professional portrait painter known for his sharply observant portraits of many influential artistic, political and social figures of the time.