Three works by artist Vincent Van Gogh including one with a letter written on the back of it have fetched £8,471,750 at auction in London.
The letter from Van Gogh to his brother was a rare find
The sale included a unique "lost" pen and ink sketch of his house in Arles just 21 cm high with a letter to the artist's brother Theo on the reverse.
The text is considered to be the only known example of the artist ending a letter on the back of a drawing.
The drawing, which fetched £845,250, had not been on the market or exhibited for nearly 80 years until the sale at Christie's auction house.
Just one line of the letter has been published before, back in 1928 in the de la Faille Catalogue Raisonné of Works on Paper.
The sale of Impressionist and Modern art at Christie's auction house, which also takes place 150 years since Van Gogh's birth, also included two paintings.
Nature Morte, Vase avec Oeillets, which was completed in 1890, sold for £4,261,250 and is considered to be a fascinating example of the work the artist produced after he left Paris for the South of France in 1888.
La maison de Vincent à Arles was thought to have been lost
It is thought to have been painted in the house of Dr Gachet, at Auvers.
And Une Liseuse de Romans, an oil on canvas, fetched £3,365,250.
It was painted in September 1888, and depicts a woman reading a book.
A separate Van Gogh work made the news recently when it was among three valuable paintings stolen from an art gallery in Manchester in April.
Une Liseuse de Romans was painted in 1888
A month later they were found and put back on display at the same venue.
The works by Van Gogh, Picasso and Gauguin - worth a total of £4m - were taken from the Whitworth Art Gallery.
They were found the following day wrapped in a cardboard tube in a nearby disused public toilet.
A note from the thieves claimed the paintings were taken to highlight poor security at the gallery.
Nature Mort, Vase avec Oeillets fetched £4,261,250
One of the paintings - Van Gogh's Fortifications of Paris with Houses, painted in 1878 - had to be restored after it suffered a six-inch tear in the corner.