Classicly

One day the stream of water by which the seed was carried along sank suddenly—whirling down a funnel in the ground. Slowly the grey light of day grew less as the seed dived deeper and deeper, till in absolute darkness it was rushing madly down the water-spout. Hoarse bellowings resounded about its long subterranean voyage, asserting themselves above the stifled noises of the passage of the buried river through the bowels of the earth. For weeks and months the pine-kernel revolved in these invisible currents, at times slipping slowly along the twisting flow, at other times hurled forward at a dizzy speed in the dwelling coolness of the under-ground.