Judge Nachmanoff wrote that either Mr. Elam or his mother had physical possession of the illustrations from 1960 to 1978, meaning that Mr. Elam was “entitled to the benefit of the common law presumption of ownership based on that possession.”

Source: https://www.nytimes.com/2023/11/02/arts/norman-rockwell-drawings-fdr-white-house-court-ruling.html