He was also a noted scholar, philosopher and author, whose 1911 translation of Immanuel Kant's Critique of Judgement is still widely used by students today.
In 1896, while a student at Trinity, he became the British Quarter Mile Champion, running the distance in 52 seconds and beating Fitzherbert of Cambridge, the championship holder.
Coincidentally, his future brother-in-law, Howard Meredith Percy (1879–1902), won for Canada the inter-collegiate championship in the half-mile and mile runs when at McGill University.
In 1914, Meredith had approached Sir Thomas Myles to use his yacht, the Chotah, to land guns for the Irish Volunteers at Kilcoole.
[2] Meredith himself helped out aboard the Chotah during the operation with his friends Erskine Childers and Edward Conor Marshall O'Brien.
In 1917, Meredith campaigned with George William Russell and Sir Horace Plunkett for the establishment of the Irish Convention in an attempt to find a way around the Unionist stonewall against self-government.
Meredith was appointed President of the Irish Supreme Court over Arthur Clery because he was by then a King's Counsel (a senior barrister).
However, Laurence Ginnell and others in the judiciary who supported this initiative of reviving aspects of Brehon Law took the losing anti-Treaty side during the subsequent Civil War (1922–23), and so the project came to nothing.
In 1934, he was asked by the League of Nations to oversee the Saar valley plebiscite on the French/German frontier, and in 1937, he returned to the Supreme Court of Ireland.
She frequently took her two daughters (Moira and Brenda) to stay with them, particularly at the country home in Livingston County, Michigan, of her uncle, Howard Graves Meredith (1856–1934), described by Lord Birkenhead as "a great character, and one of the most attractive and warm-hearted men I have ever met".
Never one to follow the crowd, he became a Quaker in later life and, after his death, 14 August 1942, was buried at the Friend's Temple Hill Cemetery, Blackrock, Dublin.