334 GREAT LAND-SLIP, CHAP. XVI. 



LAND-SLIP ON NORTH MIDLAND LINE, NEAR AMBERGATE. 



part of the railway occupying fifteen months instead 

 of two. 



The Oakenshaw cutting near Wakefield was also of a 

 very formidable character. About six hundred thousand 

 yards of rojck shale and bind were quarried out of it, and 

 led to form the adjoining Oakenshaw embankment. 

 The Normanton cutting was almost as heavy, requiring 

 the removal of four hundred thousand yards of the 

 same kind of excavation into embankment and spoil. 

 But the progress of the works on the line was so rapid in 

 1839, that not less than 450,000 cubic yards of excava- 

 tion were effected per month. 



As a curiosity in construction, we may also mention 

 a very delicate piece of work executed on the same rail- 

 way at Bullbridge in Derbyshire, where the line at the 

 same point passes over a bridge which here spans the 

 river Amber, and under the bed of the Cromford Canal. 

 Water, bridge, railway, and canal, were thus piled 

 one above the other, four stories high ; such another 



