MARINE BIOLOGICAL STATION AT PORT ERIN. 149 



here at that date. It would be very interesting and 

 instructive to have a complete plan made of each floor of 

 the castle. Mr. Armitage Rigby is now preparing such 













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BACKS or HOUSES AMO JAHBtNS 





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GROUND FLOOR PLAN 



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Fig. 49. Plan of Castle Rushen. 



plans, and has kindly allowed us to reproduce here that of 

 the ground floor of the castle (fig. 49)^ 



Of camps and small earthworks of the Historic period, 

 besides those of earlier date still in use, the oldest recorded 



