Mr Henry Hart (Harte)¹ was born in Drumiskabbole², Ballysadare, Co Sligo, Ireland around 1882 although no record for his birth has been located.

He was one of seven children born to Michael Hart (b. 1843), a farmer, and Mary Cunningham (b. 1841) who were married in Calry, Co Sligo on 2 July 1862. The family were Roman Catholic and versed in both Irish and English languages.

Henry's siblings were: Bessy (b. 16 March 1865), Mary (b. 23 September 1867), Bridget (b. 1868), Francis (b. 26 May 1870), Michael Dominic (b. 4 October 1873) and Catherine (b. 23 October 1879).

The 1901 census shows Henry, described as a farmer's son, and his family residing at house 33 in Drumiskabbole; his father passed away on 7 July the following year from cancer. The 1911 census shows that Henry's mother and brother Frank were residents of house 18 in Drumiskabbole. Henry does not appear on the latter record as he had migrated to the USA the previous year, joining siblings already there; his brother Michael and sister Catherine (Mrs Wilhelm Schram) both lived in Brookline, Massachusetts; another sister, Mrs Jeremiah (Bridget) Collins, had died there on 14 July 1901.

Henry was married in Belmont, Massachusetts on 30 July 1911 to another Irish-American, Bridget "Delia" McGillicuddy (b. 3 December 1879) of Killorglin, a coastal town in Co Kerry, the daughter of blacksmith Dennis McGillicuddy and the former Bridget Fahy. Bridget and Henry reportedly worked together for a sugar company owned by E. F. Atkins in Belmont. The couple returned to Ireland aboard Cymric on 10 August 1911, Henry at the time being described as a cook, and settled in Killorglin where Bridget still had family.

Whilst in Ireland Henry and his wife discovered that they were expecting a child. With perhaps Henry planning to travel back to the USA and straighten out his affairs there before returning to Ireland to settle permanently, he originally booked passage to America aboard the Celtic. Hart instead boarded the Titanic at Queenstown as a third class passenger (ticket number 394140 which cost £6, 17s, 2d). Described as a general labourer, he was headed to Marion, Massachusetts where he had a relative, John Hart³. During the voyage he became acquainted with several others from Sligo, including Margaret Devaney. It was she who reported that it was Hart who came to her cabin to alert she and her cabin mates Kate Hargadon and Mary Burns of the danger. 

Henry Hart died in the sinking and his body, if recovered, was never identified.

His elderly mother outlived him by over a decade; she remained in Drumiskabbole with her son Frank before she passed away on 24 February 1923 whilst in her 80s. Frank died only a few years later on 23 July 1928.

Henry's widow Bridget, who had been pregnant at the time of the sinking, later gave birth to a son whom she named after his late father and who was born in Killorglin, Co Kerry on 14 May 1912. 

Bridget never remarried and remained in Killorglin for the rest of her life. She died aged 74 on 29 October 1954 following a bout of influenza.

The younger Henry Hart later worked as a labourer and was married on 5 September 1936 in Killorglin to Bridget Flynn of Bansha, Co Tipperary. What became of him remains uncertain.