ANDREW ROBERTSON (after) ( 1777 - 1845 ) was a British painter. ANDREW ROBERTSON (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 185.25 USD for Harriet, Countess of Guilford, seated in white dress holding a letter, coral necklace, white flowers in her upswept hair in 2006 to 2652.87 USD for An artist called Sir William C