text:  Though instances may be produced in the works of other painters which may justly stand in competition with those I have mentioned such as the 'Isaiah ' and 'Vision of Ezekiel ' by Raffaelle the 'St Mark' of Frate Bartolomeo and many others; yet these it must be allowed are inventions so much in Michael Angelo's manner of thinking that they may be truly considered as so many rays which discover manifestly the centre from whence they emanated