The case was interesting. Case law is clear in cases where Jewish art was seized by the Nazis. In this instance, however, Mendelsson-Bartholdy had turned the art over to a somewhat suspect art dealer before his death, after which the pieces migrated to Switzerland, and eventually to the United States. The museums contended either that he had given the artwork to his wife as a wedding present before 1933, or that he had been under no untoward pressure to sell, and that therefore the heirs had no claim.
The lead attorney discovered several items relating to the family on the GPA, and asked if I could provide copies of them, and perhaps others as well. That turned out to provide several interesting months of research at my end as I provided dozens of relevant items.
I was scheduled to testify at the trial before a federal court in New York early in February, but as often happens, the case settled on the day the trial was to begin. The details of the agreement are sealed, though one can reasonably assume that if one asks for $400,000,000, one does not settle for $500,000.
The settlement got considerable publicity. A later NYT article reported that the judge was unhappy with the secrecy of the settlement, noting that the issue was of larger public interest.