Marble, 181cm high, London, c1777, British Museum
© Trustees of the British Museum. (CC BY-NC-SA 4.0) https://goo.gl/h6BEAB
This statue is described by the British Museum website as “Marble statue of the Hon Mrs Anne Seymour Damer (1749-1828) as the Muse of Sculpture by Giuseppe Ceracchi (1751-1801)”.
Mrs Damer was herself a sculptor, so, intriguingly, this is a sculpture of a sculptor, posing as the muse of sculpture, by a sculptor!
My notes on the work can be found here: Statue of The Hon Mrs Anne Seymour Damer