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XI. of a Letter from Mr . William Ar- 
deron F P. S. to Mr. Henry Baker F jR* F 
concerning the Formation of Pebbles. 
Dear Sir, 
Read April 2, J]\[ m y late Searches after Sands, Peb-~ 
j[_ blcs, and other Foffils, m our County 
of Norfolk (fome whereof I had the Pleafure to fend 
you not long ago) I made fuch occaflonal Obferya- 
tions on the Situation and Condition of the feveral 
Bodies I met with, as Reafon mud, I think, fugged 
to every Man that confiders them. I fhali trouble 
you with no Hypothcfis, nor form any random 
Gueffes, to account for fuch their Situation, and the 
Condition wherein they are found 5 but, if a Rela- 
tion of true Fads, and Conclufions naturally dedu- 
cible therefrom, may prove acceptable, they are in- 
tirely at your Service. 
In all Strata of’ Pebbles, that I have yet examined, 
there are fome which are broken, and whofe Pieces 
lie together, or very near each other; but, as Bodies 
of fuch Hardnefs could not be broken without fome 
confiderable Force or Violence, their Situation 
implies, that they differed fuch Force or Violence 
as broke their Parts afunder, in or near the Place 
where they at prefent lie. 
Others again have had Pieces broken from them, 
though not the lead Fragment of thofe Pieces can 
now be found : From whence we mud conclude, 
that whatever might be the Caufe of their Fradure, 
they mud either have been broken at fome Place 
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