Isaac Witkin's show in Locks Gallery's roof garden became an accidental memorial exhibition when the artist died, at age 69, only a few weeks after helping to select the work and oversee its installation. The four large welded-steel pieces, from his middle period, represent only a narrow sampling of his output. A true memorial exhibition, encompassing a full range of this important sculptor's work, will have to wait.
Beginning as a student of Anthony Caro and assistant to Henry ...