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O'CALLAGHAN,¹ Sir Francis Langford, KCMG, CSI, CIE (1839–1909), civil engineer, was born on 22 July 1839, the second son of James O’Callaghan JP, of Drisheen, co. Cork, and his wife, Agnes, daughter of the Reverend Francis Langford. He was educated at private schools and at Queen's College, Cork. From 1859 to 1862 he received training in applied engineering while employed under Henry Conybeare on railway construction in Ireland and south Wales. Success in a competition, fourth out of forty, for a position in the Indian Public Works Department resulted in his appointment (he was one of the ‘Stanley Engineers’) as a probationary assistant engineer on 13 June 1862.