was then lost, owing to more than 400 years of subsequent development, until archaeological investigations in 2012 revealed the site of the garden and Greyfriars Church. There was a memorial ledger stone in the choir of the cathedral, since replaced by the tomb of the king, and a stone plaque on Bow Bridge where tradition had falsely suggested that his remains had been thrown into the river. According to another tradition, Richard consulted a seer in Leicester before the battle who foretold that "where your spur should strike on the ride into battle, your head shall be broken on the return". On the ride into battle, his spur struck the bridge stone of Bow Bridge in the city; legend states that as his corpse was carried from the battle over the back of a horse, his head struck the same stone and was broken open. Issue Richard and Anne had one son, Edward of Middleham, who was born between 1474 and 1476. He was created Earl of Salisbury on 15 February 1478, and Prince of Wales on 24 August 1483, and died in March 1484, less than two months after he had been formally declared heir apparent. After the death of his son, Richard appointed his nephew John de la Pole, Earl of Lincoln, as Lieutenant of Ireland, an office previously held by his son Edward. Lincoln was the son of Richard's older sister, Elizabeth, Duchess of Suffolk. After his wife's death, Richard commenced negotiations with John II of Portugal to marry John's pious sister, Joanna, Princess of Portugal. She had already turned down several suitors because of her preference for the religious life. Richard had two acknowledged illegitimate children, John of Gloucester and Katherine Plantagenet. Also known as 'John of Pontefract', John of Gloucester was appointed Captain of Calais in 1485. Katherine married William Herbert, 2nd Earl of Pembroke, in 1484. Neither the birth dates nor the names of the mothers of either of the children is known. Katherine was old enough to be wedded in 1484, when the age of consent was twelve, and John was knighted in September 1483 in York Minster, and so most historians agree that they were both fathered when Richard was a teenager. There is no evidence of infidelity on Richard's part after his marriage to Anne Neville in 1472 when he was around 20. This has led to a suggestion by the