Melanie Gerlis mentions in her Financial Times column that Christie’s is selling a cache of works from Clement Greenberg’s family:

A group of 21 works, estimated at $1.2m-$1.7m, from the Manhattan home of the legendary postwar critic Clement Greenberg and his wife, Jenny, come to auction at Christie’s in New York on May 11. Included are pieces by Anthony Caro, Jules Olitski, Kenneth Noland and Helen Frankenthaler, whose 1950 ink “Sketch of Clement Greenberg” is offered for $15,000-$20,000. The works are being sold by the Greenbergs’ heirs.

The Art Market: Quest for the young collectors (FT.com)