1814-1819 Medical apprentice at the South Infirmary hospital in Cork, Ireland. In 1817 spent 6 months training at the Richmond Hospital, Dublin.

1820 30 November, appointed Hospital Assistant in the British Army Medical Department by commission. Employed at the fort hospital, Chatham, Kent.

1821 22 May to 29 November, on General Staff, visited various Mediterranean posts.

1822 6 months study at St. George's Hospital, London. 2 August, received diploma as member of Royal College of Surgeons of England.

1823 3 February, embarked for Ceylon.

1825 20 October, promoted to Assistant Surgeon, 41st Regiment of Foot, a regiment serving in Burma at that time.

1826 25 August, arrived in India for over five years' service.

1827 Present in field, and held medical charge of the 41st Regiment in a campaign against Kholapore. Served in garrison at Belgaum.

1828-1830 September 1828 to October 1830, served as Staff Surgeon on General Staff, and at the King's Depot in Bengal.

1832 Dartnell returned to United Kingdom on sick leave. 19 December, married Anna Maria Bennett of Lifford, County Donegal.

1833 On General Staff, by exchange, in U.K., 2 August, birth and death of first child, Rebecca, at Chatham.

1834 3 July, birth of daughter Alicia Isabella, place unknown.

1835 12 June, sailed for Canada, arriving 21 July. At Montreal.

1836 5 July, birth of daughter Maria Jane at Montreal. Visited Niagara, Toronto, en route to Penetanguishene.

1838 2 April, birth of son John George at Penetanguishene. Visited Niagara en route to Quebec City.

1839 4 January, promoted to Surgeon, Royal Regiment of Foot. 6 December, birth of daughter Anna Maria Ingall at Montreal.

1840 At Montreal; 1 May, marched to London with Royals. Made several visits to Port Talbot over the next two years.

1841 14 November, birth of daughter Georgina Mary at London.

1842 October, trip to St. Marys with H.C.R. Becher.

1843 January, trip to Niagara Falls with Alexanders. June, Royals left London for Toronto. September, visited New York State and Niagara. October, traveled down the St. Lawrence with Royals to Quebec City; 4 November, transport Premier wrecked in the St. Lawrence at Cap Chat, en route to the West Indies.

1844 6 January, death of daughter Maria Jane at Lifford, Ireland. February, returned to U.K. on sick leave. 14 November, birth of daughter Margaret Jane at Lifford.

1845 14 March, promoted to Staff Surgeon, First Class. Superintendent Military, Lunatic Asylum, Great Yarmouth. Publication of Dartnell's book, A Brief Narrative of the shipwreck of the Transport "Premier" . . .

1847 31 July, birth of son George Bennett French at Lifford.

1850 19 October, birth of son William Abraham at Rochester, Kent.

1854 24 November, promoted to Deputy Inspector-General of Hospitals; became Principal Medical Officer at Chatham, Kent.

1855 3 March, received and escorted Queen Victoria and royal party around Fort Pitt Hospital at Chatham. 17 April, birth of daughter Ella Octavia Mary at Lamerton, Devon.

1857 16 January, retired from the army on half-pay.

1858-1876 Proprietor, Arden House Private Lunatic Asylum, Henley-in-Arden, Warwickshire.

1867-1873 Exhibited watercolours with the Royal Birmingham Society of Artists.

1876 Sold Arden House, and retired to Leamington Spa, Warks.

1878 22 July, died at Leamington, aged seventy eight.