Slide over Transparent Depths.
Some of the rivers we paddle on are often the colour of chocolate and carry a heavy load of silt, especially after rain on the hills, but some rivers and streams run transparent almost all the time.
On shallow stream like the Célé you can very often look at the stones and rocks on the river-bed as you glide over. You can see the wraiths and shadows of fish too as they move suddenly from light to shadow. Very often you have to depend on the polarising effect of the sun to peer down into the depths. Just the right amount of sunshine and at just the right angle and all the life below you can come into focus.
The Tarn river though is something else. For some unfathomable reason this river is so clear as to be invisible. Even when the canoe is gliding over deep pools between the shallower riffles the water is astonishingly transparent.
The canoe seems to glide in space at the juncture of two worlds. You are between the blue and the glassy pellucid green.