
          Mr Greene has sent me all this lichens, incluidng many
of value - though they are not arranged, not all named.
Byt may I not hope ot see some authentick American
specimens; such as you once promised me? I have had
to depend wholly on foreign books and foreign specimens

To explain doubts and difficulties - but I need not say how ear-
nestly I long for that assistance which your specimens of
our species alone can give. The want of this led me to the dangerous
step of making two or three new species in this rticle which I fear I may
have to take back, though at present I see no reason. I am dear sir most respecty
+ truly
Edw. Tuckerman junior
        