speak too highly of the kindness and warmth with which my ad- 
vances have been received, and without which indeed very much 
interesting matter must of necessity have been omitted. I hope that 
I have acknowledged in every instance the remarks thus received. 
My obligations are particularly due to H. C. Watson, Esq., who 
very kindly left out of his new Botanist's Guide any account of 
the Ferns, on purpose that I might benefit by his checked lists ; 
also for the valuable remarks of Mr. W. Wilson, Mr. W. Leighton, 
Dr. Murray, Mr. W. Pamplin, Mr. Beevis, Mr. Castles, and Rev. 
W. Bree. 
And now, kind reader, I leave the work in your hands, conclud- 
ing with the words of Linnaeus to Haller: — “ If you have remarked 
errors in me, your superior wisdom must pardon them. Who errs 
not while perambulating the domains of nature ? Who can observe 
every thing with accuracy ? Correct me as a friend, and I as a 
friend will requite the kindness.” 
G. FRANCIS 
55, Great Prescot Street, 
March 1st, 1837. 
