To this I may add an Observation of a Man that had an old Ulcer on each Leg, which being attempted to be cured, as the Matter gradually lessened, he was deprived of his Sight. There was no Alteration to be observed in the Eyes of this Person, but only a Dilatation of the Pupils, as is generally observed in a _Gutta Serena_, which was judged to be his Case. In short, upon the running of the Sores, though he had been perfectly blind, he effectually recovered his Sight again. I will not tire you, _Sir_, with the Recital of any more Cases of this Nature. What has been hitherto said, I hope is sufficient to incline you to believe, that the immediate Cause of the Death of the Child I spoke of in the former part of the Letter was the Suppression of the Matter, which had continued to discharge in such large Quantities so long together. And that such a sudden Stoppage of a Discharge of Matter may procure a Patient’s Death, though the Symptoms that proceed may be different. I have likewise shewn the Difficulty there is in Diverting the Tendency of the Matter to a Part, and mentioned how one Disease is sometimes converted into another: But of what Use these Remarks may be I leave you to judge. To me it seems reasonable enough to suppose, that as a regular Method of Practice is not the Effect of a Man’s Sagacity, but the Product of repeated Experiences, every thing that occurs may tend, by a proper Application, to the Illustration of the Art. What else has made some Men so famous for their Prognosticks? Had not our great Master _Hippocrates_ a Respect to the Suppression of the Discharge of Matter from Ulcers, when he expressed himself thus, _Ulcus lividum & siccum, aut cum virore pallidum lethale est?_ And this we have known to be true in several Cases. Well then, does not this sufficiently prove, that where we have Cause to fear a Suppression of the Discharge, we ought to remove any Impediment that may embarass Nature in her Work, and advise a proper Method to promote the precipitating the morbific Matter? For so shall we, by joining our Forces with those of Nature, still keep her in due Course; and that when she is grown languid, and departing from her former Measures.