As to the First, In short, I say, the fresh Water may receive again a saline Tincture near the Superficies of the Earth, by passing through some salt _Mines_, or else many of the saline parts of the Sea may be kept back, though not all. And as to the Second, The same _Spring_ may be fed and supplyed by divers _Caverns_, coming from very far distant parts of the _Sea_, so as that it may in one place be _high_, in another _low water_; and so by that means the _Spring_ may be equally supply’d at all times. Or else the _Cavern_ may be so straight and narrow, that the water not having so ready and free passage through it, cannot upon so short and quick mutations of pressure, be able to produce any sensible effect at such a distance. Besides that, to confirm this _hypothesis_, there are many _Examples_ found in _Natural Historians_, of _Springs_ that do ebb and flow like the Sea: As particularly, those recorded by the Learned _Camden_, and after him by _Speed_, to be found in this _Island_: One of which, they relate to be on the Top of a Mountain, by the small Village _Kilken_ in _Flintshire_, _Maris æmulus qui statis temporibus suas evomit & resorbet Aquas_; Which at certain times riseth and falleth after the manner of the Sea. A Second in _Caermardenshire_, near _Caermarden_, at a place called _Cantred Bichan_; _Qui (ut scribit Giraldus) naturali die bis undis deficiens, & toties exuberans, marinas imitatur instabilitates_; That twice in four and twenty hours ebbing and flowing; resembleth the unstable motions of the Sea. The _Phænomena_ of which two may be easily made out, by supposing the _Cavern_, by which they are fed, to arise from the bottom of the next Sea. A Third, is a Well upon the River _Ogmore_ in _Glamorganshire_, and near unto _Newton_, of which _Camden_ relates himself to be certified, by a Letter from a Learned Friend of his that observed it, _Fons abest hinc, &c._ The Letter is a little too long to be inserted, but the substance is this; That this Well ebbs and flows quite contrary to the flowing and ebbing of the Sea in those parts: for ’tis almost empty at Full Sea, but full at Low water. This may happen from the Channel by which it is supplied, which may come from the bottom of a Sea very remote from those parts, and where the Tides are much differing from those of the approximate shores. A Fourth, lies in _Westmorland_, near the River _Leder_; _Qui instar Euripi sæpius in die reciprocantibus undis fluit & refluit_, which ebbs and flows many times a day. This may proceed from its being supplyed from many Channels, coming from several parts of the Sea, lying sufficiently distant asunder to have the times of High water differing enough one from the other; so as that whensoever it shall be High water over any of those places, where these Channels begin, it shall likewise be so in the Well; but this is but a supposition.