At Last: A Christmas in the West Indies by Charles Kingsley

I had a few days of pleasant wandering in the centre of the island, about the districts which bear the names of Naparima and Montserrat; a country of such extraordinary fertility, as well as beauty, that it must surely hereafter become the seat of a high civilisation. The soil seems inexhaustibly rich. I say inexhaustibly; for as fast as the upper layer is impoverished, it will be swept over by the tropic rains, to mingle with the vegas, or alluvial flats below, and thus enriched again, while a fresh layer of virgin soil is exposed above. I have seen, cresting the highest ridges of Montserrat, ten feet at least of fat earth, falling clod by clod right and left upon the gardens below.

There are, doubtless, comparatively barren tracts of gravel toward the northern mountains; there are poor sandy lands, likewise, at the southern part of the island, which are said, nevertheless, to be specially fitted for the growth of cotton: but from San Fernando on the west coast to Manzanilla on the east, stretches a band of soil which seems to be capable of yielding any conceivable return to labour and capital, not omitting common sense.