Charles Darwin states that he saw, from the base of the Andes, "the masts of the vessels at anchor in the bay of Valparaiso, although not less than twenty-six geographical miles distant," and that Anson had been surprised at the distance at which his vessels were discovered from the coast, without knowing the reason, namely, the great height of the land and the transparency of the air. Steamers may be detected much farther than sailing vessels, for, as one says, when their hulls and masts of wood and iron are down, their smoky masts and streamers still betray them; and the same writer, speaking of the comparative advantages of bituminous and anthracite coal for war-steamers, states that: "From the ascent of the columns of smoke above the horizon, the motions of the steamers in Calais Harbor [on the coast of France] are at all times observable at Ramsgate [on the English coast], from the first lighting of the fires to the putting out at sea; and that in America the steamers burning the fat bituminous coal can be tracked at sea at least seventy miles before the hulls become visible, by the dense columns of black smoke pouring out of their chimneys, and trailing along the horizon."

Though there were numerous vessels at this great distance in the horizon on every side, yet the vast spaces between them, like the spaces between the stars, far as they were distant from us, so were they from one another — nay, some were twice as far from each other as from us, — impressed us with a sense of the immensity of the ocean, the "unfruitful ocean," as it has been called, and we could see what proportion man and his works bear to the globe. As we looked off, and saw the water growing darker and darker and deeper and deeper the farther we looked, till it was awful to consider, and it appeared to have no relation to the friendly land, either as shore or bottom, — of what use is a bottom if it is out of sight, if it is two or three miles from the surface, and you are to be drowned so long before you get to it, though it were made of the same stuff with your native soil? — over that ocean, where, as the Veda says, "there is nothing to give support, nothing to rest upon, nothing to cling to," I felt that I was a land animal. The man in a balloon even may commonly alight on the earth in a few moments, but the sailor's only hope is that he may reach the distant shore. I could then appreciate the heroism of the old navigator, Sir Humphrey Gilbert, of whom it is related, that being overtaken by a storm when on his return from America, in the year 1583, far northeastward from where we were, sitting abaft with a book in his hand, just before he was swallowed up in the deep, he cried out to his comrades in the Hind, as they came within hearing, "We are as near to Heaven by sea as by land." I saw that it would not be easy to realize.

On Cape Cod, the next most eastern land you hear of is St. George's Bank (the fishermen tell of "Georges," "Cashus," and other sunken lands which they frequent). Every Cape man has a theory about George's Bank having been an island once, and in their accounts they gradually reduce the shallowness from six, five, four, two fathoms, to somebody's confident assertion that he has seen a mackerel-gull sitting on a piece of dry land there. It reminded me, when I thought of the shipwrecks which had taken place there, of the Isle of Demons, laid down off this coast in old charts of the New World. There must be something monstrous, methinks, in a vision of the sea bottom from over some bank a thousand miles from the shore, more awful than its imagined bottomlessness; a drowned continent, all livid and frothing at the nostrils, like the body of a drowned man, which is better sunk deep than near the surface.