the Heat of the Sun ; under this firft Layer there was a 
Stratum of fat Clay, which at prefent lies open in 
feveral Places, and which is very moift, fo that one 
even fees the Water bubbling out of it in fome 
Places. 
The great Rains that fell in the Beginning of the 
Spring, foaked through and diluted this Stratum of 
Clay, which retained and gathered all the Waters 
of the Hill running between the two Layers j th.e Heat 
of the Summer enfued, which dried up the upper 
Surface, and formed it into a fort of folid Cruft, 
which Cruft refting itfelf upon a fat and moift Clay^ 
and by its fteep Situation being inclined to Aide to- 
wards the Valley, the whole Surface of it loofened 
itfelf by great Pieces, and breaking in feveral Places, 
Aided along towards the Place whither its D-^clivity 
would naturally carry it. There are fome Parts 
which moved almoft infenfibly, and only funk or 
fubAded, either becaufe the Rolling of the neigh- 
bouring Soils rnade rpoha, that what was under this 
Surface might Aide off, or perhaps becaufe the Parts 
under this Surface had been hollowed a long while 
fmce, by the Waters which palfed between this Sur- 
face and the Stratum of fat Clay. Ocher Parts, 
which were much more in Number, rolled all to- 
gether towards the Valley, and one fees yet whole 
Pieces of Vineyards, with the Props remaining up- 
right ; which may eafily be conceived : There are 
again other Parts, which in tumbling were over- 
turned in different manners. 
I am to add here, that this Accident is not with- 
out Example in the Province of Auvergne j we have 
not indeed feen fo eonfidcrable a one till now, yet 
