Great Art Explained - Season 4 Episode 6 Thomas Gainsborough

At first glance, Thomas Gainsborough's Mr and Mrs Andrews, looks like just another classic painting of the 18th century, celebrating the dynastic marriage of the upper classes in all their finery. On closer inspection, two things stand out. One, is that Mrs Andrews has the most curious expression of contempt on her face. The other thing that stands out is the strange area in the middle of her lap which is unfinished. The rest of the painting is complete, so it makes it even more peculiar. In a painting that is heaving with tension, it is almost certain that at some point Mr and Mrs Andrews were so unhappy with the painting, that they put a halt to the proceedings, and sent Gainsborough on his way. The painting would then disappear and wouldn't be seen again for over 200 years. Why was this painting kept so secret for so long?