262 WAVES OF THE SEA 



the water there is 2 feet 5 inches above the level of the river in 

 front of the bore. 



Fig. 4 shows the bore rushing over the Stonebench. The 

 mean level of water at the post is 2. feet n inches above low 

 water, but there is a noticeable difference of level at front and 

 back of the post, indicated by a dark shadow on the picture. 

 This shows that the current, which, shortly before the bore 

 arrived, I found to be ebbing seawards at O'8 mile per hour, 

 is now making in the opposite direction with considerable 

 strength. The boat remains in position, being anchored. 



