Page:Quarterly Journal of the Geological Society of London, vol. 28.djvu/552

456 rhizome, rose in a serpentine direction to the seam of gravel 2 feet above, where it ended, and no trace of it was seen either in the gravel or the sand above. This section was seen by Mr. Flower and Mr. Searles Wood, the latter of whom suggested, in explanation of the position of the frond, that the rhizome of the fern must have been washed down by the stream, the heavier part resting on the bottom, and the frond rising towards the surface, in which position it must have become imbedded in volumes of sand. If this explanation is correct, it is evident that the flow of the river at that time must have been from west to east, viz. the direction of the present river. I leave it, however, for botanists to determine whether it may be possible that the rhizome of a fern of the surface-period may, by natural growth, have descended to so great a depth as 8 feet 6 inches from the surface.

Section G, at the top of Lorne Terrace, surface 83 feet, furnished the largest and best-formed implement discovered in this place. It is triangular, 8 inches long and 4 inches at the base; the natural surface of the flint is left at the butt-end. It was found beneath several deposits of sand, gravel, and brick-earth, at a depth of 13 feet 6 inches from the surface. The upper surface of the London Clay was here seen to slope gently upward towards the north.

Section H (fig. 4), shows the position of a number of flakes