What hath been hitherto said may enough suffice to observant _Readers_, inasmuch as the Fundamentals of the whole Artifice, are therein contained; but least the curious should complain, that I have only made their Mouth water, I shall ingeniously discover to them what in four Years time, wherein I have endeavoured to instruct some Deaf Persons, I have observed what is worthy, and most necessary to be known. Now what I have effected by this my Method, especially to the Daughter of Mr. _Kolard_, a Merchant of _Harlem_, I can appeal to a great part of _Holland_, and universally almost to the whole City of _Harlem_, and to innumerable other Witnesses, of all Ranks and Conditions. The first thing which I require in the Person I am to teach, is, that he be of a docible Wit, and not too young of age; than that the _Organs of Speech_ be rightly constituted in him; for stupid Persons are capable of no Teaching, whose Age is yet too tender; nor do they mind enough, nor know how Teaching will be for their Use and Benefit; but those whose _Organs of Speech_ are altogether unfit, they may learn indeed to understand others when they speak, and discover their own Mind by Writing; but they will never learn to speak. Having therefore a fit subject, my first Care is to make him to sound forth a _Voice_, without which, almost all labour is lost, but that one point, whereby Deaf Persons do discern a _Voice_ from a _Mute Breath_, is a great Mystery of Art; and if I may have leave to say so, it is the _Hearing of Deaf Persons_, or at least equivolent thereunto, _viz._ that trembling Motion and Titillation, which they perceive in their own _Throat_, whilst they of their own accord do give forth a _Voice_; that therefore the Deaf may know, that I open my Mouth _to emitt a Voice_; not simply to yawn, or to draw forth a _Mute Breath_, I put their Hand to my _Throat_ that they may be made sensible of that tremulous Motion, when I utter my _Voice;_ then I put the same Hand of theirs to their own _Throat_, and command them to imitate me; nor am I discouraged, if at the beginning their _Voice_ is harsh and difficult; for in time it becomes more and more polite.