(4) 
haps from some other cause, has been of a nature ra- 
ther to excite than to gratify curiosity in those desirous 
of information on the subject. At least this was the 
effect produced in my own mind, and tended very 
powerfully to prevail on me to commence a strict 
and minute examination of our Rocks at different 
points, from the Plym to the Tamar, and which I 
have now continued, at different intervals, for a con- 
siderable time, whenever the professional duties of a 
laborious situation afforded me leisure for that purpose, 
The success that has already attended my labours, 
and which has more than answered my expectations, 
will be evident from the number of Lithographic 
Plates of animal remains accompanying this little 
volume; which have been taken from drawings of 
specimens, selected from a considerable number, col- 
lected by myself, and found im situ. Much more, 
however, remains yet to be done; and I am not 
without a hope, that: some other individuals, more 
experienced, and whose time and inclination will 
allow of it, may be induced, by seeing how far I 
have gone, to engage in the same pursuit, so that by 
united endeavours, an Account of the Limestone of 
