placed his trust principally in his Lancastrian retainers". Henry IV died on 20 March 1413. William Ros played no significant role in government from then on, after probably attending his last council meeting in 1412. Charles Ross posits that he was "no particular favourite" of the new king, Henry V, which Ross attributed to Henry V's distrust of his father's loyalists (who, in his eyes, kept him from what he felt was his rightful position at the head of government during his father's illness). Whether or not Henry excluded him from the government, Ros lived only eighteen months into the new reign. His mother had drawn up her will in January 1414, of which Ros was an executor. Early that year, Ros sat on a final anti-Lollard commission and was tasked with investigating the murder of an MP in the Midlands. Ros died in Belvoir Castle on 1 November 1414. He had drawn up his will two years earlier, and added a codicil in February 1414. He died a wealthy man, with one of Yorkshire's highest disposable incomes. Three of William Ros's children fought in the last period of the Hundred Years' War. John, his heir, was born in 1397 and was legally a minor when Ros died. The Earl of Dorset, the king's cousin, received custody of the Ros estates. Before he inherited, John travelled to France with the new king in 1415 and fought at the Battle of Agincourt at the age of seventeen or eighteen. He died in 1421 at the Battle of Baugé with the king's brother, Thomas, Duke of Clarence and Sir Gilbert V de Umfraville. William Ros's second son Thomas was only fourteen at John's death, and fought with Thomas, Earl of Salisbury, at the siege of Orléans in 1428; he died after a skirmish outside Paris two years later. Thomas' heir (also named Thomas) inherited the lordship as 9th baron and played an important role in the Wars of the Roses fighting for the Lancastrian king, Henry VI; he was beheaded after his defeat by the Yorkists at the Battle of Hedgeley Moor in 1464. Ros's wife, Margaret Fitzalan, lived until 1438. She had received her dower by February 1415 and, at the marriage of Henry V to Catherine of Valois in 1420, entered the new queen's service as a lady-in-waiting. Margaret attended Katherine's coronation and travelled with her to see Henry in