176 



HORSE-SHOES AND HORSE-SHOEING. 



cise information with regard to them. This turf-pit has 

 yielded numbers of coins from the first half of the 15th 



31 _--^^ 32 



fig. 29 



century to the year 1480. These were only covered by 

 23 1" inches of turf, still spongy, but which had never- 

 theless taken at least four centuries to form. Taking 

 this particular case into consideration, and reckoning the 

 overlying deposit as accumulating at the rate of 6 inches 

 in a century, — far too low an estimate by reason of the 



