452 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. " 



materials are known to have been used in England for implements 

 of this age. With these exceptions, all the specimens that have been 

 found were formed from nodules of chalk-flint which it is probable had 

 previously been long exposed upon the surface. Many of the flints 

 found with the implements have been fractured by internal expansion, 

 resulting probably from atmospheric influences ; some of the imple- 

 ments themselves have been made from stones thus broken, and others 

 were broken by the same means afterwards. Many points and butts 

 are also found, which doubtless were broken in the process of manu- 

 facture, the fractured surface retaining precisely the same patina or 

 stain as the worked surface. 



Although the implements of this district bear a certain general 

 resemblance to those with which we are familiar from the Somme, 

 as well as to those of Salisbury, and Hoxne, and Icklingham, I think 

 that some slight differences may be detected as regards shape and 

 workmanship ; and indeed it seems by no means certain that the 

 implements found at Broomhill do not differ from those at Brandon. 

 Thus at the former place they are often of a wedge-like form, 

 resembling rudely a shoe or foot with a high instep, a variety which 

 is not found at Brandon ; while at the latter pits they sometimes 

 occur of a large leaf- like pattern, about 8 inches long by 4 wide and 

 only 2 inches thick at the thickest end, tapering off to ^ of an inch. 

 I have never met at Shrub Hill or Broomhill with any others of this 

 form. In other localities differences have been noticed in the imple- 

 ments found in deposits quite as near to each other as these. Those 

 of St. Acheul differ from those found at Montiers ; and Mr. E. T. 

 Stevens, who has so carefully studied the Wiltshire implements, 

 assures me that the group found at Bemerton is of a type decidedly 

 different from those at Milford Hill, a mile and a half distant, and 

 that both of these differ from those found at Hill Head in Hampshire. 

 Possibly each place may have had its own workmen, and perhaps in 

 some cases different shapes were used to meet different requirements. 

 It would be inconvenient to attempt here to give a detailed account 

 of these differences ; and, indeed, much longer and more careful obser- 

 vation is needed before we can arrive at any certain conclusions on 

 the subject. 



No shells, either fluviatile or marine, have as yet been discovered in 

 either of the several deposits above described ; but since my former 

 paper was published, I have found at Thetford a thin seam of fine white 

 sand, with a few land and freshwater shells, lying some feet above 

 the gravel in which the implements occur. Two teeth of Elejohas 

 primigenius, as well as some bones of Bos Urus, have also been found 

 in the Thetford gravel; and from Shrub Hill I have some fragments 

 of the horns of deer, and teeth of some ruminant, probably deer also, 

 as well as some teeth of a small species of horse, all much broken 

 and rolled; with these exceptions I believe that no mammalian 

 remains have hitherto been noticed in these beds, nor any other 

 traces of man's presence than the flint and stone implements. 



The geography of the district, with reference to other places in the 

 neighbourhood in which implements have been found, wiU be under- 



