Background
HEFFERNAN, John Harold was born in 1834.
HEFFERNAN, John Harold was born in 1834.
Two daughter Assistant engineer, 1855. Gold medal, Atlantic Telegraph, 1858. Served Alexandria, then promoted to Inspector of Machinery, and to Chief Insjjector of Machinery in 1885.
Retired, 1892.
Spouse 1861, Eliza Sarah,daughter of late West. Hilton, Ollerton Lodge, Nutsford.