 Thornhill claimed a third successive Munster Championship winners' medal - the fourth of his career - after a 4-06 to 3-06 victory over Limerick in the 1944 Munster final replay.On 3 September 1944, he again lined out at full-back in a fourth successive All-Ireland final appearance and ended the 2-13 to 1-02 victory over Dublin by becoming one of a select group of players to have won four successive All-Ireland medals.Thornhill retired from inter-county hurling following this victory.