From Colchester I took another step down to the coast; the land running out a great way into the sea, south and south-east makes that promontory of land called the Naze, and well known to seamen using the northern trade. Here one sees a sea open as an ocean without any opposite shore, though it be no more than the mouth of the Thames. This point called the Naze, and the north-east point of Kent, near Margate, called the North Foreland, making what they call the mouth of the river and the port of London, though it be here above sixty miles over.
At Walton-under-the-Naze they find on the shore copperas-stone in great quantities; and there are several large works called copperas houses, where they make it with great expense.
On this promontory is a new mark erected by the Trinity House men, and at the public expense, being a round brick tower, near eighty feet high. The sea gains so much upon the land here by the continual winds at south-west, that within the memory of some of the inhabitants there they have lost above thirty acres of land in one place.
From hence we go back into the county about four miles, because of the creeks which lie between; and then turning east again come to Harwich, on the utmost eastern point of this large country.
Harwich is a town so well known and so perfectly described by many writers, I need say little of it. It is strong by situation, and may be made more so by art. But it is many years since the Government of England have had any occasion to fortify towns to the landward; it is enough that the harbour or road, which is one of the best and securest in England, is covered at the entrance by a strong fort and a battery of guns to the seaward, just as at Tilbury, and which sufficiently defend the mouth of the river. And there is a particular felicity in this fortification, viz., that though the entrance or opening of the river into the sea is very wide, especially at high-water, at least two miles, if not three over; yet the Channel, which is deep, and in which the ships must keep and come to the harbour, is narrow, and lies only on the side of the fort, so that all the ships which come in or go out must come close under the guns of the fort—that is to say, under the command of their shot.