 The challenge to Blacket was to create a building which worked within the limitations of scale but still had the imposing quality of a cathedral.Once again, Bishop Broughton's aim was to have a replica of the Magdalen College tower, but Bishop Selwyn of New Zealand had laid the foundation stone in 1842, and his recommendation had been for two towers.Blacket initially designed towers that accommodated the wishes of both Bishops, but he also wrote to a relative in Yorkshire asking them to send drawings of the façade of York Minster.