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nULLKTlN OF TIIK NATUKAL HISTORY SOCIETY. 
turn into the cave any stream which mi^ht have come down this 
valley in former times. 
That the cave is pre-Glacial in its origin is very evident since 
the outlet is now choked with Glacial deposits ; how much older, 
it would be difficult to say ; but at least this may be said, that the 
topography of the district where the cave is situated, has been 
greatly changed since the cave was formed. 
Winter Curtain of the Cave. 
Occasionally in mid-winter a striking spectacle may be seen 
at the mouth of the cave. The warm air flowing out of the 
cave condenses its moisture on the roof in a deposit of hoar-frost, 
that in still weather hangs pendent like a curtain from the roof at 
the entrance. To see this canopy in all its beauty, one needs to 
go inside the sloping descent into the cave and look out through 
the entrance on a bright sunny afternoon ; the western sun then 
lights up this curtain so that it becomes a mass of brilliant silver 
spangles, which, as the sun goes down, become varied with rain- 
bow tints. Thus cold weather, still air and a western sun, give 
an added winter beauty to Oliver’s cave. 
The following are the lengths of dififerent parts of the cave 
(A) Slope at the entrance, 32 feet 
Landing at the bottom of the slope, 8 
(B) Passage to antechamber, 16 
(C) Antechamber of the main cavern (flat loam floor), .. ..24 
(D) Main chamber of the cave, 60 
(E) Small chamber at a lower level with loam floor, 16 
(F) Low passage to inner chamber, 12 
( G) Inner chamber of cave, 24 
(H) Slope to the well at end of cave, 20 
(I) Well sloping southward, depth unknown, 
Measured length of cave, 212 
These measurements are based on the plan of the cave made by Mr. Robert Matthew, 
whicli was on a scale of H feet to an inch. 
