[Illustration: A Triple Natural Arch, Santa Cruz, Cal.]
No. 7 shows what has been a quadruple arch, only one part of which is still standing. Out in the sea, lonely and by itself, appears a pier, scarcely emergent from the waves, which once supported an arch parallel to the one now standing and also one at right angles to the shore. The one now standing makes the fourth. But the ever-working sea carves and carries away arch and shore alike. At some points a careful and even admiring observer sees little change for years, but the remorseless tooth gnaws on unceasingly.
[Illustration: Remains of a Quadruple Natural Arch, Santa Cruz, Cal.]
On the right near the point is seen a board sign. It says here, as in many other places, "Danger." Sometimes two converging waves meet at the land, rise unexpectedly, sweep over the point irresistibly, and carry away anyone who stands there. One large and two small shreds of skin now gone from the palm of my left hand give proof of an experience there that did not result quite so disastrously.
The illustration facing page 188 is another example of an arch cut through the rocky barrier of the shore. But in this case the trend of the less hard rock was at such an angle to the shore that the sea broke into the channel once more, and then the combined waves from the two entrances forced the passage one hundred and forty paces inland. It terminates in another natural bridge and deep excavation beyond, which are not shown in the picture.
