There is a sad story detailed in the Newhampton Road Wesleyan Church Roll of Honour about a Corporal J. Newton Williams of the Royal Welsh Fusiliers (number 266790), as follows:
While training in Southern Ireland he was in involved in an accident which broke his leg. After a long spell of hospital treatment involving six operations he died in Blackrock Hospital 19/04/1919
The only corroboration of this information is his entry on the Commonwealth War Graves Commission site, which includes the fact that he is buried at Beaumaris Cemetery on Anglesey.
His probate records state the following:
WILLIAMS, John Newton of Menaifron Beumaris Anglesey a cadet in H. M. Army died 19 April 1919 at the Military Hospital Blackrock county Dublin Administration (with Will) Bangor 11 July to Anne Williams widow. Effects £764 8s. 5d.
The son of Peter and Anne Williams, John was born in Anglesey on 14 September 1890. He became a bank clerk, and worked for the Wolverhampton Branch of the National Provincial Bank of England. The Royal Bank of Scotland has got more information about him here. He is also commemorated on the Beaumaris town war memorial, and the Beaumaris panel of the North Wales Memorial Arch in Bangor.