Mark Rothko, Black-Form Paintings No 1, no 2, no 4, no 5, no 5 (2), no 6, no 7, no 8 , 1964, Mixed media on canvas. The TATE gallery in london says this about them: “Although not related to a commission, Rothko clearly recognised the Black-Form paintings as a coherent series and numbered them sequentially No. 1 to No. 8, with No. 5 curiously appearing twice. Yet they were never shown as a series during his lifetime. These works mark a complete break with his colour field paintings of...