Less than three years later, Henry was in command of part of the English forces. He led his own army into Wales against Owain Glyndŵr and joined forces with his father to fight Henry "Hotspur" Percy at the Battle of Shrewsbury in 1403. It was there that the 16-year-old prince was almost killed by an arrow that became stuck in his face. An ordinary soldier might have died from such a wound, but Henry had the benefit of the best possible care. Over a period of several days, John Bradmore, the royal physician, treated the wound with honey to act as an antiseptic, crafted a tool to screw into the embedded arrowhead (bodkin tip) and thus extract it without doing further damage, and flushed the wound with alcohol. The operation was successful, but it left Henry with permanent scars, evidence of his experience in battle. Bradmore recorded this account in Latin, in his manuscript titled "Philomena". Henry's treatment also appeared in an anonymous Middle English surgical treatise dated to 1446, that has since been attributed to Thomas Morstede.