PREFACE. 
A Part of the present volume vras pub- 
lished some years ago, in detached numbers 
or fasciculi. Circumstances, in which the reader 
can take no immediate interest, prevented, at 
that time, the completion of the work. It 
now appears in an entire form; and, I trust, 
will not be found to have suffered from the 
delay, with Avhich it has unavoidably been 
attended. 
“ Derbyshire Petrifactions” exhibited the 
only attempt that had then been made in Eng- 
land to give coloured figures of extraneous 
fossils ; — but abroad some extensive and highly 
finished works had previously shown an un- 
* Number 1, of “ Derbyshire Petrifactions,” was published in 1794. 
b 
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