NOW, Doctor, since I have happily conquer'd so stubborn an Enemy, by such miraculous means, as do not fail to afflict others as well as my self, I desire you will vouchsafe me your real Sentiments of this uncommon way of Cure, your Notions of the _Genii_, and the wonderful manner of communicating the _Recipe_, your Thoughts of the Loadstone and the Virtues thereof, your Opinion of Sympathy and the Cures perform'd thereby, for I know you are Philosopher sufficient, as well as Physician, to give a very good light into all these Mysteries, in which I own I am to seek; therefore hope you will condescend so far as to spend a leisure Hour upon the foregoing Particulars, and you will infinitely oblige, _Sir_, _Your assured Friend_, _and humble Servant_, Duncan Campbel. [Illustration] _To my Deaf and Dumb Friend, Mr._ Duncan Campbel, _in Answer to his Letter to an anonymous worthy Friend, Physician and Philosopher_. _SIR_, I RECEIV'D your Letter and read the same, with no less Surprise than Satisfaction; for, as I am greatly pleas'd at your miraculous Recovery, so, I am equally astonish'd at the wonderful Means by which it was obtain'd; I confess, I have been too great a Student in Physick and natural Philosophy, to entertain any extraordinary Opinion of Miracles, no ways accountable to human Reason, except those that concern Religion, which are brought down to our Knowledge well attested and recommended to our Faith by unexceptionable Authorities; not, but, that I am ready to admit, that the Power of Healing is in the Hand of Providence, and that some Patients, when their Distempers, thro' the frailty of humane Judgment, derive their Essence from so obscure an Original that even puzzles the Physician, I am free to acknowledge, especially when the Blessing of God accompanies the Administration, that the most trifling application in the Eyes of Art, may recover such Persons from the most dangerous Infirmities: This, I look upon to be your extraordinary Case, and therefore think not the means to which you ascribe your Cure or the manner of the _Recipe_'s being communicated to you, a proper subject for a Physical Enquiry, unless you had sent me the Prescription of your _Genius_, which I understand by your Letter, you are oblig'd to conceal, and then perhaps I should have been able to have judg'd, in some measure, which of the Applications are most Essential, the Powder or the Loadstone, also how far your Guardian Angel is a Regular Proficient in the modern Practise of Physick. HOWEVER, as you desire my Opinion of the _Genii_, the Loadstone, the Powder of Sympathy, and the like, I shall not be only willing to give you my own Thoughts, but the Sentiments of others, before I take my leave, who have made the foregoing Particulars their principal Studies, and are therefore better acquainted with the nature of Spirits, than I pretend to be.