Sir Thomas Grey or Gray (d. before 22 October 1369) of Heaton Castle in the parish of Cornhill-on-Tweed, Northumberland, was the son of Sir Thomas Grey, an eminent soldier in the Anglo-Scottish wars in the reigns of Edward I and Edward II, and his wife, Agnes de Bayles. He was the author of the English chronicle, the Scalacronica. Family Thomas Grey, author of the Scalacronica, was the son of Sir Thomas Grey of Heaton (d. before 12 March 1344) and his wife Agnes de Bayles. Grey had four sisters, who according to Andy King married John de Eure, William de Felton, William Heron, and Gerard Salvayn. Grey's father served almost continuously during the Anglo-Scottish wars in the reigns of Edward I and Edward II. In May 1297 Grey's father was left for dead on the field when William Wallace attacked Lanark, but recovered, and was active in various campaigns in the ensuing years. In May 1303 the elder Grey was captured by the Scots at Melrose Abbey, and after his release was at the siege of Stirling Castle the following spring, where he rescued Henry de Beaumont, with whom he was closely associated for much of his career. Later, at Bannockburn, Grey's father was taken prisoner by the Scots in a skirmish on 23 June 1314, the day before the main battle. He was constable of Norham Castle from 1319 to 1331, and appears to have died shortly before 12 March 1344. Career Grey had already been knighted before his father's death, and according to King, likely served in Scotland alongside his father in the 1330s, and may have had his first experience of war in August 1332 as part of a private expedition into Scotland mounted by a group of noblemen and gentry known as the "Disinherited", which culminated in a battlefield victory at Dupplin Moor. In June 1338 Grey took out letters of protection to accompany William Montagu, 1st Earl of Salisbury on a military expedition to Flanders, and in 1340 served on the Scottish Marches. In March 1344 "in consideration of his good service beyond the seas as well as within", Grey was made warden of the manor of Middlemast Middleton in Coquetdale, which had come into the King's hands by forfeiture, and was also the recipient of several other smaller grants. On 8 January 1345 he was appointed Constable of Norham Castle, and on 10 April