The swarthiness, the darkness of the colour--a brownish grey--is to be insisted upon; yet to none but a careless eye does the lower Thames seem all brown and grey. The dull hues are shot with one single prevailing colour--red. Innumerable red-tiled roofs are seen as the turn of the river shows their dusky sides; iron sheds are ruddled with the red that signs flocks of country sheep; shutters are red over warehouse windows (this is a Sunday view), and everywhere are the red sails of Venice, dyed in the selfsame dye, only differently lighted. Even when there is a difficulty in fixing the place of this negroid blush, it is perceptibly there. It is latent, even when no red sail rises between grey water and grey sky; it lurks in hollows and inlets so darkly as to be almost black. Then suddenly the scarlet of a huge black and scarlet steamer comes along and gives you the colour without a shred of mystery, without charm, and with the most definite division. Besides the red, there is nothing that is coloured except a stack of timber now and then--raw wood with precisely the colours of a wheatfield in August--and the piled-up hay of a red-sailed barge loaded down to the water. These are not many on the Sunday river, but Sunday clears the colours by clearing the air. There is exceedingly little smoke; its sign is upon the whole river-side, it has re-drawn everything in black, as a child might go over a water-colour with his black pencils, but between you and the natural clouds there is nothing but fresh air, quick with the movement that seems perpetually to follow this grey waterway. Or now and then, at long intervals, a single flimsy puff of smoke comes between mast and sky; it is brown, the steam is white, and the cloud silver grey; and through each of these three with a various gleam filters the flying sunshine. Sunday seals the faces of the barns and turns the key upon the leagues of wharves; but it leaves all the cranes and masts etched in their thousands upon the low horizon. These make the thicket of the Thames-side, a deciduous, narrow wood winding east, south-east, and north, and standing everywhere in its brief winter of a day, having shed sails and burdens and put away noise. There is nothing in the handsome London of high houses so delicate as these lifted lances against the sky. Hop-gardens or vineyards, or the slender rows of sticks that carry pea plants and beans in rustic gardens, make the same play with light, and let it through as fine a design. [Illustration: _A Back Street._]