ordinary Trench all along the middle of the Swamp, plac'd a Sluice at the Mouth, where it opens into the back Creek; for the Mouth of the Channel there is narrow, has a good hard bottom, and is not past two Yards deep when the Flood is out; as if Nature had designed it before hand: They might thus drain all the Swamp absolutely dry, or lay it under Water at their Pleasure. I have talked several times hereof to Mr. _Sherwood_, the owner of the Swamp, yet nothing is essayed in Order thereto. And now since we are speaking of _James Town_ give me leave to adjoin some Reflections as to the Situation and Fortifications of the Place. The Natural Situation of the place is such, as perhaps the World has not a more commodious Place for a Town, where all things conspire for Advantage thereof. _James Town Island_ is rather a _Peninsula_, being joined to the Continent by a small Neck of Land, not past Twenty or Thirty Yards over, and which at Spring-Tides is overflow'd, and is then an absolute Island. Now they have built a silly sort of a Fort, that is, a Brick Wall in the shape of a Half-Moon, at the beginning of the Swamp, because the Channel of the River lies very nigh the Shoar; but it is the same as if a Fort were built at _Chelsey_ to secure _London_ from being taken by Shipping. Besides Ships passing up the River are secured from the Guns of the Fort, till they come directly over-against the Fort, by reason the Fort stands in a Vale, and all the Guns directed down the River, that should play on the Ships, as they are coming up the River, will lodge their Shot within Ten, Twenty, or Forty Yards in the rising Bank, which is much above the Level of the Fort; so that if a Ship gave but a good Broad-side, just when she comes to bear upon the Fort, she might put the Fort into that confusion, as to have free Passage enough. There was indeed an old Fort of Earth in the Town, being a sort of _Tetragone_, with something like Bastions at the four Corners, as I remember; but the Channel lying further off to the middle of the River there, they let it be demolished, and built that new one spoke of, of Brick, which seems little better than a blind Wall, to shoot Wild Ducks or Geese.