''The Rehearsal'' by Barbara Campbell. Unfortunately we have been unable to find any information regarding the artist herself. The label verso, ''Barbara Campbell, c/o Robert Sielle...'', does help us date the work however.Robert Sielle (1895-1983) was a leading London frame-maker and exhibition agent from the 1930s-70s. The address on the label verso was his premises between 1948-1982. The price is stated in guineas, which although long phased out, was still a currency used for pricing high-end or luxury goods until the decimal system was introduced in 1971. We can, therefore, date this work between 1948-1971.The work is extremely atmospheric, almost impressionistic. The unusual composition makes it feel like one is amongst the orchestra, and the bold use of contrast and impasto gives the work a real verve.The work is housed in a deep frame with black painted interior and gilded border. The ''Robert Sielle'' label to the back of the frame is similarly age toned to that on ...