156 Mr. Petrie on the History and Antiquities of Tara Hill. 



2. The Ruins of the Forradh, which were alongside the ruins of the 

 House of Cormac, and to the west. 



3. The Mur-Tea, or wall of Tea, which was between the two preceding 

 monuments, and on the south side. 



There are, in addition to these, three other monuments within the Inclosures 

 of Rath na Riogh, whose situation is described with equal accuracy, namely : 



1 . Dumha na Bo, or the Mound of the Cow, which is described as being 

 situated to the west of the Dumha, or Mound of the Hostages. 



2. Dumha na n-Giall, or the Mound of the Hostages, which is described as 

 being situated to the north-east of the ruins o? i\\e Forradh. 



3. Fal, or the Lia Fail, which is described as lying by, or at the side of, the 

 Mound of the Hostages, to the north. 



Of these remains, the only one whose age can be conjectured from historical 

 evidences connected with its name is the House of Cormac. Supposing it to 

 have been erected no earlier than the time of the monarch after whom it was 

 called, it must be assigned to the period between the year 218, when he mounted 

 the Irish throne, and 254, when he abdicated it in favour of his son. 



The House of Cormac is a Rath, with an outer ring, having a ditch between 

 the inner and outer inclosure. The measurements of this Rath will be seen in 

 the accompanying section taken north-west and south-east, on a scale of 60 f. to 

 an inch : 



Part of Che Forradh. "i « « •> 



The parapet at a, on the north-west side, is 1 f. 1 in. higher than at b on the 

 south-west ; and is 2 f. higher than the interior of the Rath : the parapet at b, 

 on the south-east side, is also 2f. higher than the interior of the Rath. 



Of the other monuments, described as situated within the Rath na Riogh, 

 that called the Forradh seems to be the first in importance. This, as already 

 shewn, is evidently the rath described as situated to the north-west of the house 

 of Cormac, and which is connected with it. 



This monument is a Rath very similar in appearance to the House of Cormac, 



