Her slender hand and youthful eyes

Encapsulating vision’s quest

In nimble fingers paintbrush flies

Whilst skilful gaze absorbs the rest

Her palette poised, her mind beset

With the face of Marie Antoinette

The Earl of Bristol, swept askance

Did pander to his own caprice

Demanding that he have the chance

To own this glorious masterpiece

Lebrun, compelled to compensate

Agreed to paint a duplicate

Her canvas bore a likened pose

Each facet forged at his command

With all the skills her art bestows

She mimicked every sleight of hand

But replacing Marie Antoinette

With her daughter whom she called, 'Brunette'.

Author Notes
Vigee Le Brun (Marie Elisabeth Louise; 16 April 1755 - 30 March 1842) was a French painter, and is recognized as the most famous female painter of the 18th century. Her style is generally considered Rococo and shows interest in the subject of neoclassical painting. 

In 1789 Vigee Le Brun fled France to save her head. The first stop was Italy where she was welcomed like a head of state. At Florence she was asked to paint her portrait for the celebrated collection of portraits of famous artists by their own hand at the Uffizi gallery. 
Vigee Le Brun started the self portrait while in Florence but finished it in Rome.The self portrait in Florence is of the most exquisite heads she ever painted, sunny, smiling, happy, and youthful. 
The painting on the easel in the picture is of Marie Antoinette done from memory. 

The Earl of Bristol met Vigee in Naples, Italy. Captivated by her beauty, he commissioned her to paint his portrait. He further requested her to make a copy of her own portrait being completed for the Uffizi. 
In this portrait the face on the canvas depicts her daughter Julie who traveled with her and who she called "Brunette. Both paintings are at Ickworth, Suffolk.