After his sporting career, he enlisted in the British army during World War One, and was a private in the 1st Battalion of the Royal Irish Fusiliers as well as a sapper in the Royal Engineers, seeing action in France at the
Battle of Passchendaele. While serving in the latter, he received the
Distinguished Conduct Medal for conspicuous gallantry. Ledwidge was a great-great nephew of historian
Edward Ledwich and 2nd cousin of notable Irish anatomist and surgeon
Thomas Hawkesworth Ledwich. He worked for the Ordnance Survey office and later for the Land Commission before retiring. Joseph died in Dublin on 19 January 1953 and is buried in
Mount Jerome Cemetery. ==References==