Rachel Carson: The Edge of the Sea

As a very young woman Carson believed that for a career she would have to choose between her scientific interest in the ocean and her already developed skills in and love of writing. It wasn’t until the 1930s that she found a way to blend the two. It was then that she recalled reading Tennyson: “On a night when rain and wind beat against the windows of my college dormitory room, a line from Locksley Hall burned itself into my mind—

Paul Brooks is retired now, but I telephoned him at home one day and asked him if he thought she would have returned to the sea as a subject for additional books had she lived, or whether the success of Silent Spring would have pushed her writing in another direction. “Well I’m not sure,” he said. “She’d talked for years about doing a book that was vast and unfocused, that was about Life Itself. I’m glad she never wrote it, because it always sounded too vague and too broad. And although Silent Spring was a tremendous success, she never saw herself as a crusader. She just felt compelled to write that book. But, no, I don’t think she was finished with the sea as a subject.”

Today we need a Rachel Carson to write about ocean “dead zones,” the degradation of ocean habitats, the dying of coral reefs, the effects of global warming on ocean waters. And of the last, the reader will find on the early pages of The Edge of the Sea that Carson was already writing, in the early 1950s, about how ocean life was being changed by warming waters.

Brooks also added that he thought it was significant that the text she asked to be read at her own funeral was one from her writing on the sea, not one from the more recently published Silent Spring. Her request was not honored, but it would have been suitable, for the tone of the passage is elegiac. It begins, “Now I hear the sea sounds about me; the night high tide is rising, swirling with a confused rush of waters against the rocks below my study window….” It comes from the epilogue to The Edge of the Sea, and although these are among the final words of the book, they might be a good place for the reader in 1998 to begin.

Paul Brooks, Rachel Carson’s editor and her friend, is the author of The House of Life: Rachel Carson at Work. Both Mr. Brooks’s book and his remembrances of Carson were very helpful in writing this introduction. A new edition of his excellent biography is forthcoming from Sierra Club Books. I also consulted Linda Lear, a research professor of environmental history at George Washington University and the foremost authority on Carson’s life and work. She is the author of Rachel Carson: Witness for Nature, published in 1997 by Henry Holt and Company.

THE EDGE of the sea is a strange and beautiful place. All through the long history of Earth it has been an area of unrest where waves have broken heavily against the land, where the tides have pressed forward over the continents, receded, and then returned. For no two successive days is the shore line precisely the same. Not only do the tides advance and retreat in their eternal rhythms, but the level of the sea itself is never at rest. It rises or falls as the glaciers melt or grow, as the floor of the deep ocean basins shifts under its increasing load of sediments, or as the earth’s crust along the continental margins warps up or down in adjustment to strain and tension. Today a little more land may belong to the sea, tomorrow a little less. Always the edge of the sea remains an elusive and indefinable boundary.

The shore has a dual nature, changing with the swing of the tides, belonging now to the land, now to the sea. On the ebb tide it knows the harsh extremes of the land world, being exposed to heat and cold, to wind, to rain and drying sun. On the flood tide it is a water world, returning briefly to the relative stability of the open sea.

Only the most hardy and adaptable can survive in a region so mutable, yet the area between the tide lines is crowded with plants and animals. In this difficult world of the shore, life displays its enormous toughness and vitality by occupying almost every conceivable niche. Visibly, it carpets the intertidal rocks; or half hidden, it descends into fissures and crevices, or hides under boulders, or lurks in the wet gloom of sea caves. Invisibly, where the casual observer would say there is no life, it lies deep in the sand, in burrows and tubes and passageways. It tunnels into solid rock and bores into peat and clay. It encrusts weeds or drifting spars or the hard, chitinous shell of a lobster. It exists minutely, as the film of bacteria that spreads over a rock surface or a wharf piling; as spheres of protozoa, small as pinpricks, sparkling at the surface of the sea; and as Lilliputian beings swimming through dark pools that lie between the grains of sand.

The shore is an ancient world, for as long as there has been an earth and sea there has been this place of the meeting of land and water. Yet it is a world that keeps alive the sense of continuing creation and of the relentless drive of life. Each time that I enter it, I gain some new awareness of its beauty and its deeper meanings, sensing that intricate fabric of life by which one creature is linked with another, and each with its surroundings.

In my thoughts of the shore, one place stands apart for its revelation of exquisite beauty. It is a pool hidden within a cave that one can visit only rarely and briefly when the lowest of the year’s low tides fall below it, and perhaps from that very fact it acquires some of its special beauty. Choosing such a tide, I hoped for a glimpse of the pool. The ebb was to fall early in the morning. I knew that if the wind held from the northwest and no interfering swell ran in from a distant storm the level of the sea should drop below the entrance to the pool. There had been sudden ominous showers in the night, with rain like handfuls of gravel flung on the roof. When I looked out into the early morning the sky was full of a gray dawn light but the sun had not yet risen. Water and air were pallid. Across the bay the moon was a luminous disc in the western sky, suspended above the dim line of distant shore—the full August moon, drawing the tide to the low, low levels of the threshold of the alien sea world. As I watched, a gull flew by, above the spruces. Its breast was rosy with the light of the unrisen sun. The day was, after all, to be fair.

Later, as I stood above the tide near the entrance to the pool, the promise of that rosy light was sustained. From the base of the steep wall of rock on which I stood, a moss-covered ledge jutted seaward into deep water. In the surge at the rim of the ledge the dark fronds of oarweeds swayed, smooth and gleaming as leather. The projecting ledge was the path to the small hidden cave and its pool. Occasionally a swell, stronger than the rest, rolled smoothly over the rim and broke in foam against the cliff. But the intervals between such swells were long enough to admit me to the ledge and long enough for a glimpse of that fairy pool, so seldom and so briefly exposed.

And so I knelt on the wet carpet of sea moss and looked back into the dark cavern that held the pool in a shallow basin. The floor of the cave was only a few inches below the roof, and a mirror had been created in which all that grew on the ceiling was reflected in the still water below.