63 yds, 



49 , 



28 , 



178 



173 , 



491 yds, 



162 yds. 



60 „ 



69 „ 



250 Proceedings of the Royal Irish Academy. 



Length of Passages in Route I. 

 Main Passages : — 



House of Commons to big pillar, House of Lords, 



House of Lords to junction of River, 



Junction of River to foot of O'Leary's Chimney (c), 



Chimney (c) to Labyrinth entrance, 



Labyrinth to end of Victoria Cave, 



Side Passages : — 



The Labyrinth, ....... 



Loop at Demon's Cave, ..... 



Other side passages, . . . . 



291 yds. 



Route II. — From the House of Commons to the House of Lords, and 

 thence by Eoute I. until the junction is reached. Here, instead of turning 

 sharply to the right over the large boulder, you continue straight on down a 

 fissure, and descending 6 feet cross a pool of water. This pool after wet 

 weather floods to a depth of nearly 3 feet. It can, however, under such 

 conditions be turned by a short passage to the right through the bed-rock. 



You then climb the steep stalagmited rock-wall which faces you, and, 

 17 feet up, enter a straight and level tunnel. Bearing to the right for a short 

 distance, a drop brings you into a chamber which is remarkable for a particu- 

 larly fine stalactitic formation, which at the present time is active, and has 

 now become almost joined to its base. It consists of three convoluted 

 columns descending to three large corresponding cusp-shaped stalagmitic 

 bosses. One of these has joined ; a second is inactive, while the third is 

 only f inch apart from its fellow. The chamber wherein this formation 

 is situate lies in close proximity to the Scotsman's Cave, on Eoute I, as 

 reference to the plan will show. Possibly there is a connexion between the 

 two, though perhaps hardly feasible for human progress. The overflow from 

 the Eiver, which in flood-time discharges itself over the floor of this chamber, 

 disappears in that direction. 



Crossing the floor of this chamber, on which the flood water-course is 

 clearly marked, a turn to the left confronts you at once with the Eiver. 

 This is a pool of still water, 3 feet deep, and 31 feet long, filling up the 

 bottom of a perfectly straight passage 8 feet high, which runs northwards. 

 Ledges conveniently placed on either sides of its walls allow you to stride 

 across and avoid a wetting. Once across, a sharp turn to the right 



