Lot Essay
'Water in swimming pools changes its look more than any other form. The colour of a river is related to the sky it reflects, and the sea always seems to me to be the same colour and have the same dancing patterns. But the look of swimming-pool water is controllable - even its colour is man-made - and its dancing rhythms reflect not only the sky but, because of its transparency, the depth of the water as well.' (David Hockney by David Hockney, Thames & Hudson, London, 1976, p. 104).