Yet there is a reason, resumed De Lancaster, and that reason is not inscrutable to all, because not enquired into by you. That _tones_ have power over the human feelings will not be disputed; but tones have different properties, and of course different operations: the one, entire, full and legitimate _tone_ contains within itself a variety of divisional parts, by the expression and application of which various passions may be excited, and various effects produced. The full tone may be resolved into the half-tone, or _hemitonium_; the half-tone into the quarter-tone, or _diesis_; neither does its divisibility stop here, for the diesis may be again resolved, first, into its proper quarter-tone, or _tetartemoria_, which be pleased to observe, is also called _enarmonios_; secondly, into its third of a tone, or _tritemoria_, (which by the way is the true chromatique) and thirdly and lastly, into a tone, which involves a third part of a full tone and half a third, and this is called _hemiolia_--And now, my good friend, having given you some insight into the various combinations and resolutions of musical tones, according to the system of the Greek writers on the harmonics, (which, though briefly stated, cannot fail to be perfectly clear to your comprehension) I think I may trust you to discover the reason, why certain modulations and assortments of tones are pleasing to you, and others not. These are the elements of all harmony, and as you are now fully possessed of the definition of them, you cannot possibly find any difficulty in the application. I am under no difficulty at all, cried the colonel, in finding out when I am pleased, and that being the only discovery I have any concern in, I will trouble you no further to explain to me why I am pleased, but take your word for having given me the true reason, and be content. Here the lecture ended as many lectures do: the expounder was perfectly satisfied with the instruction he had imparted, and the disciple was entirely reconciled to remain in ignorance of what he did not wish to understand. At this moment Cecilia opportunely entered the room, and the recollection of Sir Owen’s proposal instantly occuring to her father, he desired to have a little private talk with her, and Wilson on the hint withdrew. CHAPTER IX. _The last in the Book. The Author presents Cecilia De Lancaster to his Readers, and trusts that he exhibits no unnatural, or ideal, Character._ Cecilia De Lancaster, of whom I am about to speak, was now in her twenty-ninth year, and three years younger than her brother Philip, father of our hero John. I have already said, that, since her father had been a widower, she had persisted in devoting her attention to him, and to the superintendance of his household.