Colonel Blair with his Family and an Indian Ayah (1786) by Zoffany. This  painting is on the Post partly because of the natural and friendly way the (alas nameless) ayah – nursemaid – is part of the family group; it goes some way to obliterating the frightful scene in The Jewel in The Crown (we have recently been obsessed with the dvd) when an Englishwoman refuses to sit in the same train compartment as an ayah. More details about the picture here.