OBSERVATIONS.
241
OBSERVATIONS. O n e walked apart and silent, Asclepius t h e wise child, with his b o s o m füll of h e r b s and r o u n d his wrist a spotted snake ; he came with downcast eyes to Cheiron, and whispered how he had watched the snake cast its old skin and grow y o u n g again b e f c r e his eyes, and how he h a d gone down into a village and c u r e d a dying m a n with a h e r b which he had seen a sick goat eat. A n d C h e i r o n smiled, and said ' T o each Athene and Apollo give some gift a n d each is w o r t h y in his place ; b u t to this child they have given an h o n o u r b e y o n d all honours, to eure w h i l e others kill.'
—Kingsley's Argonauts. BRECK GEOLOGY.—" One of the most accomplished practical Geologists in this County informs me that there is no doubt that this tract of country was actually a ränge of coast sands at a recent point of the Post-glacial period, when the great valley of the Fens was still submerged. However, it is now perfectly isolated, the nearest portion of the sea being the Wash, more than twenty miles distant, while the eastern coast with its fringe of sandhills is more than forty miles away; the intermediate country being in both cases of a totally different character, and utterly unsuited for the existence of the species in question. Although the Post-glacial epoch is comparatively a very recent one, the actual length of time which has since passed is so great that I presume few Geologists would venture to compute it even in thousands of years. And, although there has evidently been considerable oscillation of the land during the subsequent period, the deposits of gravel, &c., in different parts of the Fen Valley indicate that fresh-water agencies were at work, and that the sea had not the same action on the old coast line, since the later Post-glacial period. This view is confirmed by the absence of marine shells in these deposits, while the immense lapse of time is further shown by the presence of an abundance of a freshwater shell (Cyrena flumenalis, [Corbicula fluminalis, Müller: cf. Trans, ii, 243]) embedded in them, although the species has now totally disappeared from the seas of northern Europe, and is not known to occur nearer than the mouth of the Nile. The only reasonable conclusion is that [its present peculiar Fauna has] occupied this suitable ground from the time of the close of the Post-glacial period at least, previous to the upheaval of