Before commencing my paper on key colour, I would ask you to bear in mind that the instruments I refer to are those with keys—i.e., pianofortes and organs, either pipe or reed. In saying this, I am not allowing that “colour” will enable anyone to name the key played in by an orchestra, because, without perception of pitch this cannot be done; but the fact is, I know very little, and with regard to a very large majority, absolutely nothing of any instrument except keyed instruments. I feel I am quite safe in arguing from this standpoint, because there must be at least fifty pianos to any one instrument of any other kind that can be mentioned.