Even as a child I had had at intervals a fondness for observing strange forms in nature, not so much examining them as surrendering myself to their magic, their oblique message. Long tree-roots, coloured veins in rock, patches of oil floating on water, flaws in glass--all such things had a certain fascination for me, above all, water and fire, smoke, clouds, dust and expecially the swirling specks of colour which swam before my closed eyes.