Source: Michael Doyle Their Name Liveth For Evermore: The Great War Roll of Honour for Leicestershire and Rutland.
He was the son of Adam Warner, a coal porter, born 1845 in Burton Overy, Leicestershire and his wife Georgiana Warner (nee Grainger, married in the 3rd quarter of 1868 in the Market Harborough, Leicestershire district), born 1851 in Oxendon, Northamptonshire, and who was the daughter of Frederick Grainger. Arthur was born on the 31st January 1889 in Kibworth, Leicestershire, his siblings were, Jane, born 1869, Hannah, a dressmaker, born 1870 and William, an apprentice, born 1877, all his siblings were born in Leicestershire, in April 1891 the family home was at Main Street, Stonton Wyville, Leicestershire. In March 1901 Arthur was residing in the family home at High Street, Kibworth Beauchamp, Leicestershire together with his father, a coal porter, his mother a laundress and his sister, Jane, a domestic mother’s help. In April 1911 Arthur was absent from the family home at High Street, Kibworth Beauchamp, residing there was his father, a coal porter and his mother, Arthur was employed as a grocer’s assistant and was residing as a boarder at 2, Queen Street, Rushden, Northamptonshire. Arthur was educated at the Grammar School in Kibworth, Leicestershire and on leaving became a Commercial Traveller. He joined the Leicestershire Yeomanry on the 13th December 1915 and served with the Expeditionary Force in France and Flanders from March 1916, taking part in many engagements, and died at a Casualty Clearing Station on the 18th April 1918 of wounds received in action while on patrol a few hours previously. His Commanding Officer wrote, “He was in my Squadron, and I always found him everything that an English soldier should be.” Arthur was unmarried. Other sources show his place of residence as Leicester. At the beginning of April 1918 the Leicestershire Yeomanry was absorbed by Regiments in the 3rd Brigade, and therefore ceased to exist, it must therefore be assumed that Arthur was serving with another unit at the time of his death.