According to the National Union Catalog of Manuscript Collections or NUCMC
http://lcweb.loc.gov/coll/nucmc/nucmc.html
Dartmouth also has an Occom diary. Additionally, there is stuff at the
Mohegan research center, Conn. State Library, Smithtown (NY) Public
Library, and in Minnesota.

Wayne Miller

David Allen writes:

>      I searched the OCLC database for information on this subject. Occoms
> last name is spelled with an "Occom"  rather than "Occam," which may
> explain in part why your search was unsuccessful.
>
>      The only thing I was able to turn up in the database was a three page
> pamphlet entitled "Ten Indian remedies:  from manuscript notes on herbs and
> roots."  It was privately printed by Edward Connery Latham in 1954.  There
> is a note in the record "by Rev. Samson Occom as compiled in the year
> 1754."  Only one library is listed as holding this work (Dartmouth
> College).
>
>      I believe the Occom papers are held at the Connecticut Historical
> Society.  You might contact them to get a copy of the complete manuscript.
>
> David Allen
> Melville Library
> SUNY Stony Brook