Below the eastern rim the dunes fall in steeps of sand to the beach. Walking the beach close in along these steeps, one walks in the afternoon shade of a kind of sand escarpment, now seven or eight feet high and reasonably level, now fifteen or twenty feet high to the top of a dome or mound. In four or five places storms have washed gullies or “cuts” clean through the wall. Dune plants grow in these dry beds, rooting themselves in under old, half-buried wreckage, clumps of dusty miller, Artemisia stelleriana, being the most familiar green. The plant flourishes in the most exposed situations, it jumps from the dune rim to the naked slopes, it even tries to find a permanent station on the beach. Silvery gray-green all summer long, in autumn it puts on gold and russet-golden colourings of singular delicacy and beauty.
The grass grows thickest on the slopes and shoulders of the mounds, its tall leaves inclosing intrusive heads and clumps of the thick-fleshed dune goldenrod. Still lower down the slope, where the sands open and the spears rise thin, the beach pea catches the eye with its familiar leaf and faded topmost bloom; lower still, on desert-like floors, are tussock mats of poverty grass and the flat green stars of innumerable spurges. The only real bushes of the region are beach plum thickets, and these are few and far between.
The Eastham Dunes from the Inlet
All these plants have enormously long taproots which bury themselves deep in the moist core of the sands.
The greater part of the year I have two beaches, one above, one below. The lower or tidal beach begins at mean low water and climbs a clean slope to the high-water mark of the average low-course tide; the upper beach, more of a plateau in form, occupies the space between high water and the dunes. The width of these beaches changes with every storm and every tide, but I shall not be far out if I call them both an average seventy-five feet wide. Unseasonable storm tides and high-course tides make of the beach one vast new floor. Winter tides narrow the winter’s upper beach and often sweep across it to the dunes. The whole beach builds up in summer as if each tide pushed more and more sand against it out of the sea. Perhaps currents wash in sand from the outer bars.
It is no easy task to find a name or a phrase for the colour of Eastham sand. Its tone, moreover, varies with the hour and the seasons. One friend says yellow on its way to brown, another speaks of the colour of raw silk. Whatever colour images these hints may offer to a reader’s mind, the colour of the sand here on a June day is as warm and rich a tone as one may find. Late in the afternoon, there descends upon the beach and the bordering sea a delicate overtone of faintest violet. There is no harshness here in the landscape line, no hard Northern brightness or brusque revelation; there is always reserve and mystery, always something beyond, on earth and sea something which nature, honouring, conceals.
The sand here has a life of its own, even if it is only a life borrowed from the wind. One pleasant summer afternoon, while a high, gusty westerly was blowing, I saw a little “wind devil,” a miniature tornado six feet high, rush at full speed out of a cut, whirl itself full of sand upon the beach, and spin off breakerward. As it crossed the beach, the “devil” caught the sun, and there burst out of the sand smoke a brownish prism of burning, spinning, and fantastic colour. South of me, the dune I call “big dune” now and then goes through a curious performance. Seen lengthwise, the giant has the shape of a wave, its slope to the beach being a magnificent fan of purest wind-blown sand, its westward slope a descent to a sandy amphitheatre. During a recent winter, a coast guard key post was erected on the peak of the dune; the feet of the night patrols trod down and nicked the crest, and presently this insignificant notch began to “work” and deepen. It is now eight or nine feet wide and as many deep. From across the marshes, it might be a kind of great, roundish bite out of the crest. On windy autumn days, when the sand is still dry and alive, and westerly gusts and currents take on a genuine violence, the loose sand behind the dune is whirled up by the wind and poured eastward through this funnel. At such times the peak “smokes” like a volcano. The smoke is now a streaming blackish plume, now a thin old-ivory wraith, and it billows, eddies, and pours out as from a sea Vesuvius.
Between the dunes and the marshes, an irregular width of salt-hay land extends from the sand slopes to the marshier widths of tidal land along the creeks. Each region has its own grasses, the meadows being almost a patchwork of competing growths. In the late summer and the autumn the marsh lavender, thin-strewn but straying everywhere, lifts its cloud of tiny sun-faded flowers above the tawny, almost deer-coloured grasses. The marsh islands beyond are but great masses of thatch grass rising from floors of sodded mud and sand; there are hidden pools in these unvisited acres which only sunset reveals. The wild ducks know them well and take refuge in them when stalked by gunners.
How singular it is that so little has been written about the birds of Cape Cod! The peninsula, from an ornithologist’s point of view, is one of the most interesting in the world. The interest does not centre on the resident birds, for they are no more numerous here than they are in various other pleasant places; it lies in the fact that living here, one may see more kinds and varieties of birds than it would seem possible to discover in any one small region. At Eastham, for instance, among visitors and migrants, residents and casuals, I had land birds and moor birds, marsh birds and beach birds, sea birds and coastal birds, even birds of the outer ocean. West Indian hurricanes, moreover, often catch up and fling ashore here curious tropical and semi-tropical forms, a glossy ibis in one storm, a frigate bird in another. When living on the beach, I kept a particularly careful lookout during gales.