Peter Lockhart was born in Peterhead, Aberdeenshire, Scotland, in 1880, the son of James and Sarah Lockhart. He married Frances Haddock in Liverpool on the 30th April 1908, and the family home was at 58, Jackson Street, Birkenhead, Cheshire.
He served as a fireman in the Engineering Department on board the Lusitania and was killed when she was sunk. His body was not amongst those recovered and identified afterwards. He was aged 35 years.
As he has no known grave, he is commemorated on the Mercantile Marine Memorial at Tower Hill, London.
In August 1915, Frances Lockhart was given the balance of wages owed to her husband in respect of his service before the vessel sank. This was reckoned from 17th April until 8th May, 1915, 24 hours after the
Lusitania had gone down. In addition, The Liverpool and London War Risks Insurance Association Limited granted her an annual pension to compensate her for the loss of her husband. This amounted to £36-3s-0d. (£36.15p.) which was payable at the rate of £3-0s-3d. (£3.01p.) per month.
Register of Births, Marriages and Deaths, 1911 Census of England and Wales, Commonwealth War Graves Commission, Cunard Records, UniLiv. PR 13/24, PRO BT 334.