[1] Following school, Wallis studied at the London College of Divinity and completed the universities preliminary theological examination (the exam for none-degree ordinands) in 1902.
He took a break from St John's between 1915 and the end of World War I to serve as a military chaplain.
[1] Wallis became a military chaplain in 1915 and served with the Mediterranean Expeditionary Force during World War I.
[5] His duties on the transport ship included taking services, keeping up the spirits of the men and censoring the troops letters home.
[6] Ashore, he duties included basic first aid (undressing troops and washing wounds), giving last rites and holding funerals.