Because I have always found greater Difficulty in treating _Cancers_ of the Mouth and Lips than those of the Breast, I will here relate an Instance of one upon the lower Lip that proved extreamly troublesome. It sometimes happens that one, or more, of those Glands which are spread on the Inside of the Cheeks and Lips, called _Buccales_ and _Labiales_, receive some Damage by a Bite or Blow; upon which they generally tumefy very much, become painful, and in Process of Time (if proper Means are not made use of) may become _Cancerous_. Such was the Case of a Woman about Thirty Years of Age, who having had a Blow on her lower Lip, neglected it till it was considerably tumefied, grew very painful, and became extreamly troublesome to her. The Circumference of the Swelling when I saw it, which was many Months after the Blow was received, was very much inflamed, and a small Quantity of _Icorous_ Matter discharged from several small Pustules, which over-spread it; the Middle, which was the Body of the _Cancer_, was hard, of a whitish Colour, and moveable; it’s Sides being only connected to the contiguous Parts by some small Filaments that were detached from it. The same Thing Doctor _Gendron_ has discovered in an ulcerated _Cancer_ on the Forehead of the Servant of a certain _Marquess_, as he observes in his Third _Chapter_ of the Tract we have before mentioned. I began with my Patient by applying cool and temperate Remedies, till the Inflammation was considerably abated; after this I applied our Dissolvent, which operated so mildly that my Patient was not sensible of near so much Pain as before she was apprehensive of: In short, the Body of the _Cancer_ was removed and a good digested Matter discharged from the Sore. Now all the Difficulty was after what Manner we should proceed to dispose the little _Cancerous_ Branches in the Skin to come away, but this we effected after the following Manner; the Consistent of the Medicine we before applyed, was such as was no way qualified for rooting out the Cancerous Filaments, whereupon we were obliged to procure it’s Dissolution in a proper Menstruum, though it required a considerable Time to do it; by this means, we soon found, that what before was ineffectual was now capable of effecting what we desired. This being done, the Ulcer was incarned by a Sarcotick Infusion (for I never use Ointments in these Cases) and cicatrized by the common drying Plaisters. It is to be observed, that the Scar still continues hollow (it having been healed near Two Years) and not like those that are the Consequents of well ordered simple Ulcers.