Blacket was an inventive and stylish Gothic Revival architect who utilised the forms of English Medieval prototypes reproduced in the books of his architectural library to produce designs which, although archeologically "correct", are often highly original. This was just as well, because the task that he inherited from Hume was not an easy one. It took some convincing to get the bishop to accept his deviations from the original design. The problem was how to make an imposing cathedral on foundations which were only the size of a large English parish church. Taking into account what Hume had done and the fact that some of Hume's rather amateurish window tracery was already in place, Blacket designed the cathedral in the style known as Perpendicular Gothic, used extensively at the cathedrals of Canterbury, Winchester and York.