There is no Flintshire WW1 Index Card for Stanley, as far as I can see, neither “Fallen” nor “Living”.
I noticed Stanley Mostyn Mathias’s name in the newspapers below.
COUNTY HERALD – 7th January 1916 (Page 4, Col 3)
ROLL OF HONOUR
MATHIAS – Killed in action, in Flanders, on Christmas Day, Stanley Mathias, of the Royal Garrison Artillery (second beloved son of Mr. & Mrs. Mathias of South Tottenham, London and late shipbroker of Connah’s Quay) aged 19 years.
COUNTY HERALD – 14th January 1916
CONNAH’S QUAY & SHOTTON
Death of Gunner S.M. Mathias – We regret to announce the death of Gunner Stanley M. Mathias, of the 48th Battery Royal Garrison Artillery, which occurred on Christmas Day in Flanders, and who met his death under heavy shell fire, while making a gallant attempt to save the horses. We have received the following letter, which was sent to his father from one of his comrades (his father is Mr. J.H. Mathias, formerly of Connah’s Quay, and who was well known there before going to reside in London*):- “On Christmas Day the Germans were shelling the billets very heavy, and your son was killed. I deeply regret to have to tell you this sad news, for I esteemed your son greatly, and he was a fine soldier and a credit to the battery. Please do not take this to heart very much, for he died as a soldier should, trying to save his horses, which were killed also. He died like a soldier and a man.”
* There was a strong connection to Connah’s Quay, as can be reflected in the newspaper stories about Stanley Mostyn’s Mathias’s death in the War. The Mathias family had been Ship Carpenters, Shipwrights and Chandlers for many years and I do believe that Stanley Mostyn’s uncle Thomas was still living in Connah’s Quay at 264 High Street Connahs Quay on the 1911 census and where his cousin Thomas Dover Mathias lived. Thomas Dover was to enlist as well but luckily he survived the war and went on to have an adventurous life. He was in the R.A.F. His Grandfather Thomas Mathias was living at the same address on the 1901 census.
Stanley Mostyn’s father, John Henry Mathias, had married his wife Emily Twine in St. Savious’s Church, Southwark in the September quarter of 1890.(Vol 1d Page 428). They were living with her parents, William & Eliza Twine and brothers on the 1891 census at 118, Carlton Road, Willesden County: Middlesex
By 1901 they had moved into their own house – 4, Elizabeth Villas, Westberry Avenue, Tottenham and 7 children had been born. John H. Mathias, 37, was a Shipping Clerk, born in Connah’s Quay, his wife Emily, 31 had been born in Paddington, London. Their daughters, Emily E., 9, Evelina M., 8, and Ethel, 7 with son John H. had been born in Kilburn, London. Son Stanley M. Mathias*, 5, and daughters, Beatrice, 3, and Kathleen E. 1 had been born in Harlesden, London. There was a Domestic Servant, Adelaide Farge, 15, born in Horsey, London.
* I believe that Stanley Mostyn’s name was in remembrance of his grandfather John Mathias who had been born in Mostyn. In 1901 John Mathias, 67, Carpenter and Widower, was living at 2, Ryland’s Terrace, Shotton at the home of his son Walter, John Henry’s brother and Uncle to Stanley Mostyn Mathias. Also there was Walter’s wife Elizabeth, 32, born in Mold and their daughter, Elizabeth age 2.
John Mathias (Senior), now 78 and a Pensioner, was still living in Shotton at 11, Rylands Street, Shotton, Flintshire on the 1911 census with Walter Mathias, 42, a Joiner in the Building Trade, his wife Elizabeth, 44, they had been married 13 years and 2 children had been born to them, both still living. Daughter, Elizabeth Susannah, 12 had been born in Connah’s Quay, like her father Walter. Daughter Mary Boden Mathias, 9, had been born in Shotton. 2 Boarders made up the household.
The 1911 census shows John Henry Mathias, 46, a Shipbroker’s Clerk, who had been born in Northop according to this census and living at 87a,Harringay Road West Green S Tottenham (5 Rooms), John Henry, 46, a Shipbroker’s Clerk, had been born in Northop according to this census. He and his wife Emily, 41, had been married for 20 years and 14 children had been born to them, all surviving. Daughters, Emily Elizabeth, 19, single and a Drapers’s Shop Assistant, Ethel, 17, single, Evelina Mary, 18, single and an Assistant in a Dairy Shop, Beatrice, 13, Kathleen Elsie, 11, both at school, Margaret Ruth, 8, Nora, 4, Miriam, 3, Jessie, 2 and Ellen Violet, under 1 month. Their sons were, John Henry, 15 an Office boy in Advertising, Stanley Mostyn, 14, an Oilman’s Messenger Boy, Walter, 9 and Arthur 6 made up the family.
UK, Soldiers Died in the Great War, 1914-1919 about Stanley Mostyn Matthias confirms his regimental details and gives his birthplace as Willesden, Middlesex and place of residence as Tottenham, Middlesex.
Stanley Mostyn Matthias in the UK, Army Registers of Soldiers’ Effects, 1901-1929 tell su that he died in the1/2 Sth Med. Field Ambulance on Christmas Day 1915. The sole Legatee was his father John H. Mathias.
Stanley M Matthias in the British Army WWI Medal Rolls Index Cards, 1914-1920 does not tell us where his first Theatre of War was, but he entered it on the 17th August 1914, just after war started, so he may have been in the Territorials, having taken part in training and was sent out first.