]78 
THE GEOLOGIST. 
At the south-castom extreme of tliis cave branches off anoiher of 
inferior size and consequence, bearing- about a due south coui'se, as 
may be deduced from the angle it makes with the last described. 
It is in length 20 feet 
Width 5 „ 
Height 5 to 4 „ 
" At the outward angle formed by this cave with the preceeding 
one, is to be seen a nearly circular apei'ture of about a foot and a 
half in diameter, which leads to a cavern yet unexplored, the extent 
whereof is not known with any certainty ; but conjecture and suppo- 
sition will have it to extend two arpents — an astonishing distance as 
a natural subterraneous passage. Summing the lengths of the 
several caves above-mentioned together, we have a total distance of 
a hundred and ninety-five feet of subterranity in the solid rock, offer- 
ing a beautiful roof of crystallized sulphurate of lime, carved as it 
were by the hand of art, and exhibiting at once the sublimity of 
nature, and the mastery of the all-powerful Ai'chitect of the 
universe." (See plan, plate x.). 
From the foregoing description there would seem to be five different 
caverns or galleries, and pi'obably many more, if the fifth has been 
since exploited. Three of them branch off from the entrance in 
different directions, Avhilst the remaining two do so at the tei'mina- 
tion of the central gallery. The roof throughout is covered with 
stalactites, but as no mention is made of stalagmite, nor of the pre- 
sence of bones, we are left to conclude that they were absent, 
although the chances were much in favour of finding the latter, in 
consequence of there being a free and unobstructed entrance into 
the cavern. 
20. — Gibb's Cavern, Montreal.* 
This cavern, which is of humble pretensions as to size, is situated 
in the Island of Montreal, and no account of it had appeared before 
the one which I published in the " Canadian Naturalist and Geolo- 
gist" for June, 1858. My attention was first drawn to it by my 
friend Dr. Robert Nelson, formerly of Montreal, and now of New 
York. 
The cave exists on the border of a limestone ridge, running in a 
north-east and south-west direction, which skirts a number of farms 
back of the main road at Cote St. Michel. Its dimensions are 
twenty-five yards or more in depth, with a width of two or more 
yards. The latter varies a good deal and is somewhat irregular, but 
the roof is cousidcrably wider than the floor, which is covered with 
water to the depth of some feet. A part of the floor will permit of a 
* The association of my name with this cavern by a friend is my excnse for 
retaining it hero. 
