1864–1910 Derrinlough, Birr, County Offaly, Ireland. He attended the Classical Academy and the Presentation Schools in Birr, and the Royal Charter School at Banagher when it was under head-mastership of Dr. King Joyce. His maternal uncle, Father Vincent Grogan, was Provincial for the Passionist Fathers of a province that included a monastery in Buenos Aires, Argentina. William Bulfin, the younger, emigrated to Argentina in 1884, with his elder brother, Peter. But they turned their backs on the city, and moved on out to the pampas. Hundreds of Irish emigrants from Counties Longford and Westmeath had already settled the Argentine. They had with them letters of introduction to the Passionist Fathers in Buenos Aires. The Bulfins went to the ranch (estancia) of one of these, Juan Dowling, a native of County Longford. There he met the woman whom he would eventually marry, Anne O'Rourke (originally from Ballacurra, Ballymore, Westmeath. Out on the pampas his preference was for the company of either the gauchos or the Irish, and observing both his own fellow-countrymen and the hard-riding Spanish-Indian cowboys he began to write homely sketches and stories about their lives for The Southern Cross, a weekly paper in Buenos Aires, owned and edited by Michael Dineen from Cork. In 1902, relocated to the city he had initially rejected, Buenos Aires.
He also wrote Rambles In Eirinn in 1902: a well-regarded account of his travels around the island of Ireland by bicycle. A year after his arrival in the city he was sub-editing on The Southern Cross, and shortly afterwards he was both proprietor and editor of that paper. The sketches he wrote began in The Southern Cross also, due to his friendship with Arthur Griffith, in The United Irishman and Sinn Féin. Eventually they reached the New York Daily News. They were published in book form in 1907 by Gill Publishing. Bulfin's significance to the Irish in Argentina is addressed by Wilkinson who notes that he was 'a vigorous defender of the rights of Irish Catholic immigrants. In 1906, four years before his death, he was made a Knight of St. Gregory by Pope Pius X for his work among the Irish community in Argentina. He came back again on the first day of the new year, 1910. Exactly a month later he died in his own home at Derrinlough.