The sources of the River Arun are not so famous as these two last, and it is a good thing, for they are to be found in one of the loneliest places within an hour of London that any man can imagine, and if you were put down there upon a windy day you would think yourself upon the moors. There is nothing whatsoever near you at the beginnings of the little sacred stream.
Thames had a source once which was very famous. The water came out plainly at a fountain under a bleak wood just west of the Fosse Way, under which it ran by a culvert, a culvert at least as old as the Romans. But when about a hundred years ago people began to improve the world in those parts, they put up a pumping station and they pumped Thames dry—since which time its gods have deserted the river.
The sources of the Ribble are in a lonely place up in a corner of the hills where everything has strange shapes and where the rocks make one think of trolls. The great frozen Whernside stands up above it, and Ingleborough Hill, which is like no other hill in England, but like the flat-topped Mesas which you have in America, or (as those who have visited it tell me) like the flat hills of South Africa; and a little way off on the other side is Pen-y-ghent, or words to that effect. The little River Ribble rises under such enormous guardianship. It rises quite clean and single in the shape of a little spring upon the hillside, and too few people know it. The other river that flows east while the Ribble flows west is the River Ayr. It rises in a curious way, for it imitates the Garonne, and finding itself blocked by limestone burrows underneath at a place called Malham Tarn, after which it has no more trouble.
The River Severn, the River Wye, and a third unimportant river, or at least important only for its beauty (and who would insist on that?) rise all close together on the skirts of Plinlimmon, and the smallest of them has the most wonderful rising, for it falls through the gorge of Llygnant, which looks like, and perhaps is, the deepest cleft in this island, or, at any rate, the most unexpected. And a fourth source on the mountain, a tarn below its summit, is the source of Rheidol, which has a short but adventurous life like Achilles.
There is one source in Europe that is properly dealt with, and where the religion due to the sources of rivers has free play, and this is the source of the Seine. It comes out upon the northern side of the hills which the French call the Hills of Gold, in a country of pasturage and forest, very high up above the world and thinly peopled. The River Seine appears there in a sort of miraculous manner, pouring out of a grotto, and over this grotto the Parisians have built a votive statue; and there is yet another of the hundred thousand things that nobody knows.
[On Error]
There is an elusive idea that has floated through the minds of most of us as we grew older and learnt more and more things. It is an idea extremely difficult to get into set terms. It is an idea very difficult to put so that we shall not seem nonsensical; and yet it is a very useful idea, and if it could be realized its realization would be of very practical value. It is the idea of a Dictionary of Ignorance and Error.
On the face of it a definition of the work is impossible. Strictly speaking it would be infinite, for human knowledge, however far extended, must always be infinitely small compared with all possible knowledge, just as any given finite space is infinitely small compared with all space.
But that is not the idea which we entertain when we consider this possible Dictionary of Ignorance and Error. What we really mean is a Dictionary of the sort of Ignorance and the sort of Error which we know ourselves to have been guilty of, which we have escaped by special experience or learning as time went on, and against which we would warn our fellows.
Flaubert, I think, first put it down in words, and said that such an encyclopaedia was very urgently needed.