Why do I say this... because I already check on those books and they do not have information on every single piece.
For example, on the book: "Une histoire dans l´histoire", one can read only the signature and the epoque and some name, but not the proper story of the piece! Particulary on PRODUCTION DATES before the year of 1850.
If a carry a history piece the House should be more interested in wide spreading information on Unique pieces, don´t you think?
Otherwise, I guess we´re just gonna have to wait for Alex´s job to be completed!!!