108 THE MAN-EATERS OF TSAVO CHAP. 
large block of ‘wood. This contrivance acted 
capitally, and by manipulation of ropes and pulleys 
the heavy stones were swung into position quickly 
and without difficulty, so that in a very short time 
the masonry of the bridge was completed. 
The next business was to span the sixty-foot 
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‘““THE HEAVY STONES WERE SWUNG INTO POSITION.” 
distance between the piers with iron girders. As I 
had neither winches nor sufficient blocks and tackle 
to haul these over into position, I was driven to 
erect temporary piers in the middle of each span, 
built up crib-shape of wooden sleepers. Great 
wooden beams were stretched across from the stone 
piers to these cribs, and laid with rails; and the 
