Order of the Strata, in Derbyshire, &c. 175 
rentheses in the above list, for future correction. Tt may 
be proper to add; that the nine lowest of the Séruta men - 
tioned in this list, are shown in order, with thein averaye 
thicknesses, inthe section in plate T[.in your thirty-first vol. 
The shale limestone and shale grit, are accidental or partial 
strafa, or form chance, or anomalous beds in the limestone 
shale, there shown: the grit reeks and coal-shales, follow 
each other in alternate succession upwards, from the. ist 
grit, the uppermost shown in this seetton ; always remem - 
bering, that a coal-shale of the same number is alove every 
grit rock, and a toadstone of the same number under every 
lime rock, except perbaps, the 4th or lowest, whose under 
strata are wholly unknown in Britain, I believe. The sal- 
mon-coloured grit of Rotherham, South-Anston, and an in- 
termediate line of places in Yorkshire, is.perhaps, the 16th 
grit, and the Wickersley grindstone rock is above this, in 
the succession of numbered rocks and coal-shales, which 
all terminate, under the yellow lime strata, whose edges oc- 
cupy the surface from near Nottingham to Wetherby, and 
further in Yorkshire. without the regular upper strata to 
them anywhere appearing, owing to the gravel, mn any place 
which I have visited. A great succession of strata, in- 
eluding two or three important series of coal-measures, are 
supposed to occur between the yellow lime and the red 
marl or red earth in ascending the series. 'The red marl 
contains accidental or partial strata, &c. of grit-stone, gyp- 
sum, limestone, sienite, slate, rock salt, &c. as [ hinted at 
page 40, of your thirty-first volume above quoted, but where, 
by a press error, they are called ** concoctions,’’ instead of 
concretions or nodules. The Balderton sand, and part of 
the Lias strata*, form the highest strata which are anywhere 
noticed in this List of Hills, excepting only the gravels, 
which are superficial, and accidentally distributed om ali 
the strata of the district. 
XXXI. De-« 
* See vol. xxxvi. p. 105, And while referring to this part of your Ma- 
gazine tor August last, permit me to mention, that in consequence of my in- 
guiries therein, after the geological Papers of the late Rev. John Michell, 
Sir Thomas Turton, Bart, the son-in-law and executor of Mr. Michell’s 
will, very politely wrote to inform me, that a search among his papers had 
discovered none relating to the strata of England, as I had hoped, and ex- 
pected: my hopes, and that of other geological inquirers, are therefore, now 
the more fixed, on the gentlemen who have the Woodwardian Collection and 
Papers, in care, to inform us, of what they may contain, as to the ascertained 
succession of strata in England; a search which, surely is justified, by the fol- 
lowing passage, addressed by Mr. B. Holloway to Dr. Woodward, when 
writing him an account of the pits of Fullers’ Earth in Bedfordshire, after 
mentioning several places in distant counties where the chalk and the Wo- 
burn Sand strata range, viz. 
“ This I take notice of, because it confirms what you say, of the regular dis- 
position 
