CHAP. VII. 



HOLYHEAD HARBOUR. 



211 



were founded below low water by means of the diving- 

 bell. The works were begun in 1810 and finished in 

 1824, and during their progress a small pier was run 

 out from the Pibeo rock on the opposite shore, 550 feet 

 long, leaving an opening between it and the main pier 

 of 420 feet. This pier was provided with a jetty on the 

 inside, similar to that on the main pier, composed of the 

 same kind of materials, and finished in like manner. 

 Within it was a small dry dock for merchant vessels. 



HOLYHEAD HAKBOUK. [By K. P JLeitch.] 



The total low-water space covered by these two piers 

 was about six acres ; but there was more than double 

 that area lit high water, besides a large shallow space of 

 about thirty acres for timber. 



In conformity with his usual practice, Mr. Rennie so 

 laid out this harbour as to be capable of extension, on 

 the same principles, according as the trade of the port 

 might require. Part of his original design was to 

 devote a large space in the inner portion of the bay, 

 which is dry at low water, to a wet dock of 23 acres. 



p 2 



