John Weeks Moore, Complete Encyclopaedia of Music… (1880)
“ I make my pieces difficult whenever I please, according to my disposition and that of my audience.' Yet in nothing was he so superior to himself', and to other musicians, as in writing and playing adagios, in which the most pleasing, yet learned modulation, the richest harmony, and the most elegant and polished melody, were all expressed with such feeling, taste, and science, that no musical production or performance with which I was then acquainted seemed to approach nearer perfection. ”
