Authenticity of several Pollocks and Rothkos challenged in court

Left, the “Elegy” painting that the dealer Julian Weissman bought from Glafira Rosales and sold to an Irish gallery that later demanded its money back; right, Motherwell’s “Spanish Elegy (Alcaraz) XV,” from 1953, which is part of the catalogue raisonné sponsored by the Dedalus Foundation.