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Colleagues,

Does anybody know if Caspar David Friedrich's inventory of his
works--supposedly documented in a diary of sorts--was published
anywhere, or a facsimile made?  And if so, does anybody own it?

 I am working with a patron who quite possibly has an uncataloged
Friedrich--at least according to a nineteenth-century European art
authority at a well-known auction house.  Based on Friedrich's
meticulous records, it appears that a significant number of his works
were never identified and located.  Consequently my patron is keen on
finding said inventory and looking for a match.

Thanks.