Bullock is born on May 17, 1865 at Inisherk, County Fermanagh just outside the County Cavan border near Belturbet, in what is now Northern Ireland. His father, Thomas Bullock, is a strict man who has eleven children and drives several to emigration because of his stern demeanour. Thomas Bullock works on the Crom Castle estate which runs along the Cavan/Fermanagh border and has both Catholic and Protestant workers. Protestant workers have the prime jobs and are employed as craftsmen and supervisors while Catholics work in the outer area of the estate at unskilled jobs. Folk memories of the Battle of Newtownbutler in 1689 remain long in the memory in the area where up to 1,500 Jacobite troops are hacked down or drowned in Upper Lough Erne when pursued by the Williamite cavalry. Many of the Williamite army is drawn from the local Protestant population.
Bullock is educated at Crom estate primary school run by the Church of Ireland and Farra School near Bunbrosna, County Westmeath. He fails the entrance exams at the University of Dublin. He tries his hand at farming but finds he is not suited. He moves to London in 1883 and becomes a Civil Service clerk. He takes to journalism to supplement his salary and publishes his first book of stories, The Awkward squads, in 1893. His stories are centered on Irish Catholic and Protestant small farmers and labourers and their struggles and tensions. He marries Emma Mitchell in 1899 and they have a son and daughter.
Bullock is well respected in literary circles but his books are never successful enough for him to become a full time writer. He says that the English are not interested in Irish stories and that there is no reading public in Ireland. He dislikes Orange sectarianism and is ambivalent to Irish nationalism. His novel The Red Leaguers looks at sectarianism conflict and Robert Thorne examines the lives of London clerks which is a popular theme at the time. His last and best novel The Loughsiders is published in 1924 and is the story of a conniving smallholder based on William Shakespeare’s Richard III.
Bullock’s wife dies in 1922. He spends the final years of his life in Sutton, Surrey and dies there on February 27, 1935.
Bullock’s daughter presents his literary papers, including two unpublished novels, two plays, numerous short stories and essays, and some correspondence to the Queen’s University Belfast library in the 1960s. A portrait of Bullock by Dermod O’Brien, RHA, is also at Queen’s University Belfast. His correspondence with Sir Horace Plunkett is in the archives of the Plunkett Foundation, Long Hanborough Business Park, Woodstock, Oxfordshire. Enniskillen public library has a collection of cuttings on Bullock, including some photocopied letters.