Parry was a barrister. The author of Lord Campbell's Libel Act... with an Introduction on the Law of Oral Slander (1844), Parry was promoted to sergeant-at-law, the highest ranking position for a barrister, in 1856.
He was involved in a number of celebrated cases, included the sensational trial of Arthur Orton, the Tichborne claimant. He was also the leading counsel for the World and was elected Bencher of the Middle Temple in 1878.
Well known for his theatrical style, Parry was the barrister James Anderson Rose chose to represent Whistler in 1878 at the Whistler v. Ruskin trial. Rose described him to Whistler as 'a Man of great eloquence [...] of sound judgement, discretion, and prudence' (#05233).
On 22 November 1878 Whistler arranged a dinner for Parry and his junior William Comer Petheram, also a popular lawyer, in order to give them an opportunity to view the paintings that he intended to present to the court as evidence, including Nocturne in Blue and Silver y113, Nocturne: Blue and Gold - Old Battersea Bridge y140 and Nocturne in Black and Gold: The Falling Rocket y170. Dinner is said to have been served by bailiffs who had taken possession of Whistler's house, the White House (GUW #08746).
During the trial Parry chose not to follow the arguments set out by Rose in the brief. The Pennells believed that he had ignored the document altogether. However, Parry proved himself to be a capable advocate. He declared of Whistler: 'there can be no doubt that Mr. Whistler is a genuine artist. I do not suppose he estimates himself a man of genius; but he is a conscientious, hard-working, and industrious artist who has followed his profession for years [...] occupying an independent and somewhat isolated position, holding original or even eccentric views [...] Is he to be expelled from the realm of art by the man who sits there as a despot?'
Parry, John Humffreys, A Letter on Feargus O'Connor, Esq, London, 1843; Parry, John Humffreys, Lord Campbell's Libel Act... with an Introduction on the Law of Oral Slander, London, 1844. Whistler, James McNeill, Whistler v. Ruskin: Art and Art Critics, London, 1878 . Whistler, James McNeill, The Gentle Art of Making Enemies, London, 1890 . Edward Abbott Parry, Vagabonds All, New York, 1926; Merrill, Linda, A Pot of Paint: Aesthetics on Trial in Whistler v. Ruskin, London, 1992.