...Immediately below the aperture of the perforation is the egg chamber: ashort, tunnel-shaped cavity which occupies almost the whole distancebetween one opening and that lying below it... 
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...In primitive times the worship of clefts in rocks, holes in the earth,or stones having a natural or artificial perforation, appears to havebeen almost universal...
Hugh Macmillan 「Roman Mosaics」
...He found a perforation at the top forming an arch of great width and height, and above it, at the very summit of the peak, were loose pieces of granite of considerable size...
Matthew Flinders 「A Voyage to Terra Australis」
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