"With the C[#] [Illustration: musical notation] in the female voice, and the E[b], E [Illustration: musical notation] in the male voice, the pyramids cease again to act, and, as before, in the Upper Thick, leave the formation of the sounds to the vocal ligaments alone, which at this change appear again longer and looser, but with every higher tone tighten up to F, F[#] [Illustration: musical notation] in the female voice, and in the male voice to G [Illustration: musical notation] or as it is commonly written, [Illustration: musical notation]. In the thin register the voicebox preserves its natural position as in quiet breathing." I must say here that I have never had any very clear conception of Madame Seiler's meaning when she speaks of the action or inaction of the pyramids in the formation of the registers. In the lower thick register there is, as a rule, a small triangular space between them which gets gradually smaller as the tones ascend, until it is quite closed in the upper thick. Dr. Merkel, also, has made the same observation. So far, therefore, we are agreed. But even of this I can find no trace in the thin register, where I have always noticed that the pyramids are quite close together. On this point, my assertion is borne out by Dr. Merkel, who insists upon the same thing. I also demur to Madame Seiler's statement that in this register again the vocal ligaments relax at the beginning of the upper division, and I invite the reader to test the matter by reference to the ring-shield aperture. The evidence furnished by this experiment is conclusive, because the vocal ligaments cannot possibly relax without a corresponding enlargement of the ring-shield aperture. A very striking illustration of this occurs during the transition from the Upper Thick to the Lower Thin. During the highest tones of the Upper Thick, when the tension of the vocal ligaments is greatest, the ring-shield aperture, as we have seen before, completely closes, while immediately opening very widely during the lowest tones of the Lower Thin, when the vocal ligaments are quite relaxed. Nothing of the kind takes place during the change either from the Lower Thin to the Upper Thin, or from the Lower Thick to the Upper Thick. It appears to me that Madame Seiler has rather exaggerated the importance of these minor breaks, while she does not make enough of the great break between the Upper Thick and the Lower Thin. If there is straining anywhere, it is during the attempt to carry the mechanism of the Upper Thick beyond its natural limit. In this case the tension of the vocal ligaments, as indeed of all surrounding parts, becomes so tremendous that at last the whole thing looks as though it were literally going to fly to pieces in every direction. Now change into the Lower Thin, and the relief is wonderful. Let tenors make a note of this. If they _will_ violate Nature, they must pay the penalty!