And may I say a word for the Thames otter? The list of really wild animals now existing in the home counties is so very, very short, that the extermination of one of them seems a serious loss. Every effort is made to exterminate the otter. No sooner does one venture down the river than traps, gins, nets, dogs, prongs, brickbats, every species of missile, all the artillery of vulgar destruction, are brought against its devoted head. Unless my memory serves me wrong, one of these creatures caught in a trap not long since was hammered to death with a shovel or a pitchfork.
Now the river fox is, we know, extremely destructive to fish, but what are a basketful of "bait" compared to one otter? The latter will certainly never be numerous, for the moment they become so, otter-hounds would be employed, and then we should see some sport. Londoners, I think, scarcely recognise the fact that the otter is one of the last links between the wild past of ancient England and the present days of high civilisation.
The beaver is gone, but the otter remains, and comes so near the mighty City as just the other side of the well-known Lock, the portal through which a thousand boats at holiday time convey men and women to breathe pure air. The porpoise, and even the seal, it is said, ventures to Westminster sometimes; the otter to Kingston. Thus, the sea sends its denizens past the vast multitude that surges over the City bridges, and the last link with the olden time, the otter, still endeavours to live near.
Perhaps the river is sweetest to look on in spring time or early summer. Seen from a distance the water seems at first sight, when the broad stream fills the vision as a whole, to flow with smooth, even current between meadow and cornfield. But, coming to the brink, that silvery surface now appears exquisitely chased with ever-changing lines. The light airs, wandering to and fro where high banks exclude the direct influence of the breeze, flutter the ripples hither and thither, so that, instead of rolling upon one lee shore, they meet and expend their little force upon each other. A continuous rising and falling, without a line of direction, thus breaks up the light, not with sparkle or glitter, but with endless silvery facets.
There is no pattern. The apparently intertangled tracing on a work of art presently resolves itself into a design, which once seen is always the same. These wavelets form no design; watch the sheeny maze as long as one will, the eye cannot get at the clue, and so unwind the pattern.
Each seems for a second exactly like its fellow, but varies while you say "These two are the same," and the white reflected light upon the wide stream is now strongest here, and instantly afterwards flickers yonder.
Where a gap in the willows admits a current of air a ripple starts to rush straight across, but is met by another returning, which has been repulsed from the bluff bow of a moored boat, and the two cross and run through each other. As the level of the stream now slightly rises and again falls, the jagged top of a large stone by the shore alternately appears above, or is covered by the surface. The water as it retires leaves for a moment a hollow in itself by the stone, and then swings back to fill the vacuum.
Long roots of willows and projecting branches cast their shadow upon the shallow sandy bottom; the shadow of a branch can be traced slanting downwards with the shelve of the sand till lost in the deeper water. Are those little circlets of light enclosing a round umbra or slightly darker spot, that move along the bottom as the bubbles drift above on the surface, shadows or reflections?
In still, dark places of the stream, where there seems no current, a dust gathers on the water, falling from the trees, or borne thither by the wind and dropping where its impulse ceases. Shadows of branches lie here upon the surface itself, received by the greenish water dust. Round the curve on the concave and lee side of the river, where the wind drives the wavelets direct upon the strand, there are little beaches formed by the undermining and fall of the bank.
The tiny surge rolls up the incline; each wave differing in the height to which it reaches, and none of them alike, washing with it minute fragments of stone and gravel, mere specks which vibrate to and fro with the ripple and even drift with the current. Will these fragments, after a process of trituration, ultimately become sand? A groove runs athwart the bottom, left recently by the keel of a skiff, recently only, for in a few hours these specks of gravel, sand, and particles that sweep along the bottom, fill up such depressions. The motion of these atoms is not continuous, but intermittent; now they rise and are carried a few inches and there sink, in a minute or two to rise again and proceed.