But whence come, either in Trinidad or at Turbaco, the sea-salts and the iodine?
Certainly not from the sea itself, which is distant, in the case of the Trinidad Salses, from two to seventeen miles.

It must exist already in the strata below.

And the ejected pebbles, which are evidently sea-worn, must form part of a tertiary sea-beach, covered by sands, and covering, perhaps, in its turn, vegetable debris which, as it is converted into asphalt, thrusts the pebbles up to the surface.
We had to hurry away from the strange place; for night was falling fast, or rather ready to fall, as always here, in a moment, without twilight, and we were scarce out of the forest before it was dark.

The wild game were already moving, and a deer crossed our line of march, close before one of the horses.

However, we were not benighted; for the sun was hardly down ere the moon rose, bright and full; and we floundered home through the mud, to start again next morning into mud again.