Certainly Essex has no great hills, even as it has no great buildings. But the value of hills is relative. From many places in Essex only about sixty feet above the sea there are wide views, and you may gaze upon the Kentish coast thirty miles away on the other side of the Thames. The secret of the Essex coast is the illusion of immensity. The dome of sky is scarcely interrupted by the small frettings of land and wood along the edges. In this vast atmospheric theatre a change of weather may be seen at almost any point of the compass planning its tactics on a clear hard line of horizon, and thence swinging up the sky, showing the soft white flags of peace or the threatening front of a battle formation. One even has an important sense of the monstrous nearness of natural forces when the ‘inverted bowl’ is filled with a dark low-flying scud that seems to be crushing down on you in a kind of personal assault.

Men who have become captivated by the marshes have been able to measure the gradual and unconscious change in their feelings about hills and flat lands by a visit to some such spot as the Italian Lakes. The beauty of the lakes has always to be admitted—the purity of the water, the affluence of the colour, the abrupt fall of the hills to the water, the sweetness of the glinting villages perched high up as though resting in a long and difficult climb to the sky. But at the end of a week the visitor may have found himself insisting on these beauties; he has felt that the sense of them is slipping away. He who needs to argue with himself is losing ground. He becomes unreasonably conscious that the water is imprisoned, and does not lead to the sea round the distant headland; that the sky is filched away; and that the winds are false, being misdirected by the hills and simply blowing up or down a long corridor, so that Nature is frustrated in these coddled and enchanted haunts.

In shallow estuaries like those of Essex the tides have necessarily to be studied more carefully than in deep waters. The ebb tide runs faster than the flood; for the ebb is hurried seawards, pressed on its flanks as it goes, by the weight of water that pours off the flats from either side of the channel. The flood comes in from the sea like a cautious explorer. It is as though it could afford to be slow because it has the authority of the sea behind it. Moreover, it has nothing to do with the joy and madness of escape from confinement, but daily performs a sober function of renewal. It is a deliberate, sightless creature, pushing before it sinuous fingers with which it gropes its way through the crushed jungles of matted weed.

For the gulls, the redshanks, the stint, the herons, and the curlew, the important moments of the day are when the water first leaves the banks and a refreshed feeding-ground is once more laid bare. But to the yachtsman the vital time is when the sea advances, bringing its salt breath among the drowsier inland scents, raising the weed from the dead, and changing into sensitive buoyant things the smacks and yachts which have been stranded on their sides, heavy and immobile for hours.

There are two yachtsmen at least who are almost ashamed to confess how childish in its reality is their pleasure in watching the return of the tide over the flats or up some shallow creek. They have not counted the number of times they have leaned over the side of a yacht, knowing she could not float for an hour or more, watching the tiny crabs scuttle into fresh territories as the oily flood bearing yellow flecks of tide-foam brims silently over one level on to the next; watching each weed being lifted and supported by the water until its whole length waves and bends in the tide like a poplar in a breeze; watching the angle at which the yacht has been lying correct itself until she sits upright in the mud; watching, perhaps, in the proper season, the swish and flutter of the water, and the little puffs of disturbed mud drifting away like smoke, as mullet thresh their way through the entrancing green submarine avenues. And then there is always the thrill of the moment when the rising water touches with life the dead hull of a yacht, and turns her into a creature of sensitiveness and grace swaying to the run of the tide. One moment she is as a rock against which you might push unavailingly with all your might; the next she has sidled off the ground, and will sheer this way and that in response to a finger laid upon the tiller.

As the tide rises towards its height you may see smacks—oyster dredgers, trawlers, shrimpers, and eel boats—filling the shining mouth of the estuary. The lighting of this part of the coast is like nothing else in England. A pearly radiance seems to strike upwards from the sea on to the underpart of the clouds, which borrows an abnormal glow. In these waters, when the sea is not grey it is generally shallow green, and sometimes, when there are thunder-clouds with sunshine, it becomes an astonishing jade. At sunset the vapours over the marshes burn like a furnace, and the cumulus clouds sometimes glow underneath with the dusky fire of a Red Underwing moth. When the water has left the flats the lighting does not change appreciably, because the gleaming mud, glossy and shining like the skin of the porpoises which sport along the channels, has the quality of water. The most characteristic effect is the mirage, which swallows up the meeting-point of sea and sky in a liquid glare, exalts the humblest smack with the freeboard and towering rigging of a barque, and separates the tops of trees from visible connection with the land, so that they appear to be growing out of air and water. Often one might fancy that the trees of the Blackwater and the Crouch, thus seen in the distance, were the palm-trees of some Polynesian island.

On the marshes, or reclaimed lands, which are inside the sea-walls, and are intersected by tidal dykes called fleets, sea-fowl and woodland birds mingle: curlew with wood pigeons, plover with starlings, rooks and gulls, feeding harmoniously. Here and there the mast and brailed-up sail of a barge sticking out of grazing-land tell of a creek winding in from some hidden entrance, and remind you that in Essex agriculture and seamanship are on more intimate terms than are perhaps thought proper elsewhere.

Outside the sea-walls are salt marshes (‘salts’ or ‘saltings’) which are covered only by the higher tides. In the early summer the thrift colours them with pink and white, and later a purple carpet is spread by the sea lavender. The juicy glasswort (called ‘samphire,’ though it is not the samphire of Dover Cliff in ‘Lear’) changes from a brilliant green to scarlet. Herons wade in the rivulets; the whistle of the redshanks, the mournful cry of the curlew, and the scream of the gulls which fringe the edge of the water like the white crest of a breaking wave, sound from end to end of these marshes. In the winter you may hear the honking of Brent geese. But by far the most beautiful sight is hundreds of thousands of stint or dunlins on the wing together. These birds are also called ox-birds, and the fishermen call them simply ‘little birds.’ When they wheel, as at the word of command, the variations in their appearance are almost beyond belief; now they are wreathed smoke floating across the sky, and scarcely distinguishable from the long smudge that pours from the funnel of a steamer on the horizon; now the sun catches their white underparts, and they are a storm of driven snowflakes; now they present the razor edge of the wing, and then disappear in the glare as by magic; again they turn the broadest extent of their wings, and a solid and heavy mass blackens the sky.