Read it through once

This Baptistery is endowed with the most pleasing echo of all the echoes we have read of. The guide sounded two sonorous notes, about half an octave apart; the echo answered with the most enchanting, the most melodious, the richest blending of sweet sounds that one can imagine. It was like a long-drawn chord of a church organ, infinitely softened by distance. I may be extravagant in this matter, but if this be the case my ear is to blame--not my pen. I am describing a memory--and one that will remain long with me.