Where is LL Langstroth's journal?

155 years ago today, In late afternoon on Oct. 30, 1851, LL Langstroth was
walking home from his bee yard in Philadelphia, in an area now part of the U
of Penn campus, when he figured out how to make a movable frame hive
utilizing bee space so that the bees wouldn't cement the frames in place.
He said he could barely restrain himself from shouting Eureka.

Years later he wrote that after discussing the matter with a guest at his
house he sketched the idea that night in "a private journal that I still
have in my posession."

Mann Library at Cornell has a journal, a picture of which is displayed on
their website, which has Rev. Langstroth's sketch of the movable frame, but
this is a journal started in 1852.  See
http://exhibits.mannlib.cornell.edu/beekeeping/atlantic/page2.html.

I have corresponded with the librarian.  This cannot be the journal to which
he refers, the journal that he wrote in on the night of Oct. 30, 1851.
Where is that journal?

Marc Hoffman

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