From the root of the nose, under the upper of the three smaller tumors, arises a large trunk of a vein, which ramifies up to the vertical tumor, and to the right over the upper part of the great pendulous one: these are very conspicuous, and serve to bring back the residual blood from the tumors: nor is it unlikely that the arteries bear a proportion with these veins in their size, in order to supply the tumors with the matter, which has given them their great increase; but these, lying concealed, cannot be spoken to with any certainty. If we compare this growth of the frontal bone with that of other _exostoses_, I believe there may this difference be rationally observed; that other _exostoses_ are generally attended with ulcerous tumors, which are for the most part cancerous; and these may commence at any age. I have now drawings, taken from the right hand of a man of 50, which represent risings of the _radius_ and _ulna_, with the fingers, to a most frightful degree; and these begun but six years before, and are attended with foul running ulcers; and now the bones of the arm and hand, on the left side, are beginning to have the same appearances: whereas the frontal bone of the present subject appears sound, as far as we are able to judge by examination: nor does there appear the least disposition to ulceration in any part of it. When this is the case, the growth generally begins while the subjects are young; upon which we shall be more particular a little further on. His sensation upon every part of these tumors, is exactly like that of every other part of his skin, having not the least uneasiness upon being handled. This poor man worked at day-labour in the fields till some months before he came to town.