1. Memorial:Helles Memorial

Awards & Titles:

1914-15 Star
British War Medal
Victory Medal

Early Life :

Henry was born 1887 at St. Giles, Weymouth, Dorset. His father was Henry Nottidge Moseley, a biologist and professor at the University of Oxford, and his mother, Annabel, was the daughter of biologist John Gwyn-Jeffreys. So the boy’s early interest in zoology came naturally, as did his academic prowess. He was a stellar student at the Summer Fields School and received a scholarship to Eton. He went on to earn a bachelor’s degree from Oxford’s Trinity College in 1910, before joining Ernest Rutherford’s laboratory at the University of Manchester. Initially he conducted physics demonstrations and worked as a teaching assistant, but soon traded in teaching to work as a research assistant.

Educated at Trinity College, Oxford University and went on to discover what would become "The Law of Moseley" in Physics, which was published him in 1914. ... In brief, the law states that the square root of the frequency of the emitted x-ray is approximately proportional to the atomic number."

At the time of the 1911 census, he is recorded as a 23 year old, single, University Lecturer resident at 9 Wilmslow Road, Wittington. On the 1891 census, he was resident at Highdale Road, Clevedon, North Somerset with his father, mother and three older sisters.

Further Reading: American Physical Society. A biography appears also in the Encyclopaedia Britannica.

Service Life:


Unit / Ship / Est.: Royal Engineers 

Action : Gallipoli 

The Gallipoli Campaign was fought on the Gallipoli peninsula 25th April 1915 to 9th January 1916. in a failed attempt to defeat Turkey by seizing the Dardanelles and capturing Istanbul. Ill-conceived and planned, the initial effort by the Royal Navy failed to force passage through the Dardanelles by sea power alone. It was then realised that a land force was needed to support the project by suppressing the Turkish mobile artillery batteries. By the time all was ready the Turks were well aware and well prepared. Despite amazing heroics on the day of the landings only minor beachheads were achieved and over the succeeding 8 months little progress was made. Eventually the beachheads were evacuated in a series of successful ruses.

Despite Gallipoli rightly becoming a national source of pride to Australians and New Zealanders, far more British casualties were sustained, and these days the substantial French contribution is almost forgotten.

Detail :

CWGC: Henry Gwyn Jeffreys Moseley; 2 Lt R E; 10/8/1915; Helles Memorial; aged 27;

Probate: MOSELEY Henry Gwyn Jeffreys of 48 Woodstock-road Oxford second lieutenant R.E. died 10 August 1915 at The Dardenelles Administration (with Will) London 27 May to sir Alfred Bray Kempe knight treasurer Royal Society Effects £1799 6s. 1d.

Masonic :

TypeLodge Name and No.Province/District :
Mother : Apollo University No. 357 E.C.Oxfordshire

12th March 1907
13th May 1907
11th June 1907

In the pre-1909 ledger of Apollo Lodge, Moseley is recorded in 1907 as having been initiated. His name is recorded as Henry Gwyn Jeffreys. He is a 19 year old undergraduate at Trinity College, Oxford University. He continues to pay dues into the next ledger but name changes to John Gwyn J, leading to some doubts, but his name is bordered by the same names as the previous, so this is the same man. He resigned from Apollo as he graduated through Oxford on 31st December, 1910.

Source :

The project globally acknowledges the following as sources of information for research across the whole database:

Additional Source:

Last Updated: 2020-04-28 16:43:51