Geological Observations on unstratified Mountains, 441 
been able to refrain from joining, in the regret expressed of 
late by most of my friends, that it was not wansferred, in 
great part at least, to those who could render less important 
aids to science. 
It must be learnt with satisfaction by all well-wishers to 
_ geology, that a statistical survey is in band, in which the 
Stratification of Antrim will be fully treated of by this able 
observer, and I wish that in a future communication Dr. BR. 
would inform us of the state of forwardness, and when this 
work may be expected to appear. . 
It is now near 20 years since Mr. William Smith disco- 
vered several large Hummocks resembling that of Knocklaid 
mentioned by Dr. Richardson, but on smaller scales pro- 
bably, in the vicinity of Bath; and when I was receiving 
‘instructions from him ten years ago, he explained the se- 
veral strata to me, on his coloured map, on a large scale, of 
the environs of Bath; and. it will be learnt with surprise by 
Dr. Richardson and many others, that he then held (and 
floes so yet for aught I know to the contrary) that these bold 
and soljtary, Hills were originally formed as they now stand, 
—a position which] could never give into, but combated 
from the first, with» so much freedom, that we have since 
discussed this subject less than any others ‘among his im- 
portant discoveries, except that of Faults, on which latter 
subject, I Jearnt very»little from Mr. S.; nothing indeed, 
which could lead:to a theory of them, or their important 
‘operations on the strata. 
Although I fully agree with the conclusions of Dr. 
Richardson (p. 369),.as toa great part of the Mountains 
and Hills being lett behind, or carved out as it were, from 
more extended strata than we now see, as-all those in Der- 
byshire will I think appear to be, from the facts I have stated 
in my Report on Derbysbire, lately published, vol. i. and 
in 4 paper some time ago presented to the Royal Society, 
yet, I am no Jess certain, that many other Mountains, and 
perhaps most of those having as Mr. Davy expresses it 
(page 392 of your last number): a crystalline texture and a 
stratification approaching to the perpendicular, and many 
others with somewhat different characters, may without 
impropriety be said to be formed, since their masses are the 
effects of nodular concretions, in which different substances 
were applied laterally and partially to or by the side of, or 
lapped round each other, in a manner perfectly distinct from 
the zegular and parallel stratification of which Dr. Richard~ 
son speaks, and which have been the object of Mr. Smith’s 
resgarchesy, . er 9a 
Imme~ 
