389 
You will observe in the Section it varies in thickness from 
nine inches to a foot; and in addition to the white Oolite 
pebbles (if such they are) it contains quartz pebbles, and hollow 
erystals of Carbonate of Lime. The bed upon which it rests is 
of the same thickness, and from its colour is called the “‘ Red 
bed,” from the additional presence of iron oxide. It contains 
some of the white pebbles, and, in about the same proportion as 
the dapple bed, the quartz. There is alsoa Rhynchonella, but it 
is too much broken up to enable the species to be determined. 
The next bed is 2 to 3 feet thick—a bastard Freestone. It 
easily breaks up, is very rotten and of no use for repairing roads. 
Then beet, (2 to 2 feet 6 inches of) a brown stone, considered 
the hardest on the hill, composed of shells much broken up and 
in which Pectens and Belemnites can be detected. The next is 
termed the “ Rockery bed ” from its being used very extensively 
in forming garden rock-work. It contains a good deal of oxide 
of iron, and is much perforated with Annelid borings. The 
thickness exposed is about four feet, and the upper part of the 
bed is much the harder. 
I found that in each bed, near the junction of the one that 
it rested upon, the beds appeared almost insensibly to run into 
each other, and it will be seen by the Section, that the four 
upper beds are of unéqual thickness. As the beds are much 
displaced in the quarry from the washing away of the sands 
below—some of them being at an angle of about 45—there is 
no clear section down to the sands, which are however found 
close to them, and I estimate their depth from the bottom of 
the rockery to be less than 10 feet. 
I will now read-you Professor Etheridge’s letter to me, 
from which you will gather he does not consider the dapple 
bed to contain evidence of pebbles arising from the destruction 
of Oolite beds, and he differs from Mr Strickland’s view as to 
their origin. 
“TI now write you some few lines relative to the peculiar 
“bodies or concretions in your Horsepool Rock. I have again 
“and again examined them in the specimen you gave to the 
“Museum, always with the view (yours) that they were derived 
BB 
