Large collection of ms letters (274 no.) written to his family and covering the period September 1914 to February 2019, whilst he was serving as a private in the 2nd Northumbrian Field Ambulance (63rd Division, Royal Army Medical Corps) and describing his observations as a stretcher bearer on the Western Front during the Second Battle of Ypres (April-May 1915) and also the Battle of Loos (September-October) in excellent detail. At the end of October, the division is moved to Salonica where he is employed as a Base Laboratory Assistant (1915-1919), supporting medical staff in their work and including the examination of samples from soldiers infected in the main, with dysentry, cholera and malaria. By Spring 1917, he is involved much more closely with advancements in bacteriology and by 1918, although he possesses no formal training, his role is widened to include organ extractions at post mortems and a wide variety of experimental surgery, including pioneering work associated with the spread of influenza, the advancing flu pandemic and treatment thereof. He returns to the UK in February 1919 and is demobilised in March of that year.