240 
A SUPPLEMENTARY INDEX TO VOL. II. 
Arranging the Shells described therein according 
to the several Strata in which they were found 
imbedded, from the newest towards the oldest 
in the British Serves. 
Twsreap of any prefatory remarks of my own, I will 
insert the following Letter, received from my kind friend 
Mr. Farey, viz. 
Sir, 
highly respectable Correspondents and Readers, for my 
I beg to apologize to your numerous and 
delay in furnishing the Stratigraphical Index, sent here- 
with. I had foreseen, since the perusal of my friend Mr. 
Smith’s “ Stratigraphical System,” Part i. and the three 
first numbers of his “ Strata Identified,” that a great 
deal of care and pains were necessary, (for which I could 
not until lately spare the time,) in collating these works 
of his, with the whole of the stratigraphical information 
contained in all your published numbers of “ Mineral 
Conchology,” before Indexes, at all satisfactory, could 
be made out, for you and Mr. 'Pilloch, such as I had 
imperfectly done at the conclusion of your first volume, 
in September, 1815. 
I was in hopes, that by some delay, my labour in 
hunting through maps for the situations of a considerable 
portion of the places mentioned in your’s and Mr. Smith’s 
works, might ere this have been greatly shortened, by a 
reference to the manuscript Index which my valued 
friend, the able and indefatigable Mr. Arrowsmith, of 
Soho Square, has for near two years been preparing ; 
and which is intended to contain every Name, of towns, 
villages, farms and cottages, mills, mines, collieries and 
quarries, rivers, streams, and water-falls, bays, head- 
lands, cliffs, and light-houses, mountains, hills and val- 
leys, parks, forests and woods, &e. &e.; torether with 
the district names, &c. which are to be found, not only 
