THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 173 
any plants you can spare or procure—& as a method of enabling 
you in some measure to judge what would be particularly accept- 
able of European plants I shall take the liberty to pack up with 
those you have desired in your letter (mentioned below) my Cata- 
logue of Herbar|ium] & those wanting, having just made a new copy 
—tho’ I fear you will not be able to read my Scrawl. Perhaps it 
may afford you an opportunity to send for this & that you might 
wish to have—I promise to keep back nothing of which I have du- 
plicates. Mr. Nuttall gave me information concerning the Col- 
lection of Cuba plants you allude to—but 12$ per hundred those 
extremely badly preserved—exceeds my finances. I enclose to 
you this time a general list of my desiderata in Am. Phaenogamy 
with a particular request to procure as many of them as possible 
either from collections, or from Prince’s Garden. I would go to 
some expence to get them. Is there no possibility of procuring 
any of the plants that Dr. James brought in the last expedition? 
American plants I value at least treble others—because my collec- 
tion is already so considerable. You are a happy man in having 
succeeded to get at least a glimpse of Muhlenberg’s Herbar.— 
which I have several times vainly tried to get at. Is the Cryptog. 
part so arranged as to afford an opportunity of looking it over? 
It will be absolutely necessary to do so as to the Lichens, because 
Muhl. Cat. [52] contains a number of names nowhere else oc- 
curring. 
I was very much delighted with your zealous labor on the 
Hepatics & will with pleasure afford you all the aid in my power— 
According to the French adage—highly respected by me, & which 
ought to be the motto of all naturalists “qu’une erreur découvert 
vaut toujours une vérité trouvée.” 
I am so far from being offended with any difference of opinion on 
such subjects, that I rather am inclined to forego mine very easily, 
especially where I am conscious of a want of knowledge. I should 
therefore be very glad to have your opinion especially where it 
differs from mine. Sometimes I suspect however this difference 
will arise from my having made a mistake in the reference. As to 
the Jungermannias you have the decided advantage over me of 
possessing Hooker [33] (the very sight of which at Mr Collins, 
gave me the greatest delight) & I should in every case bow to de- 
