What is these pictures worth?

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Do you want to know the value of these items?

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William Newton was a painter of the 19th century, who is listed on the art market and auctioned a lot, his price is quite varied but reaches up to 10,000 or even more... his manuscripts are kept in museums and are not for sale, so it remains It's difficult to put a price on the one you have in your hands, as there is no other for sale in the digital market for comparison. So we can base it on the price of an engraving, which would be $300-$500.

Sir William Newton (1785-1869) was an English miniature-painter, in fashion in the early part of the 19th century. He was the son of James Newton the engraver, and nephew of William Newton (1735-1790) the architect. He began his career as an engraver, and executed a few plates, including a portrait of Joseph Richardson, M.P. after Martin Archer Shee. Concentrating then on miniature-painting, he became one of the most fashionable artists of his day and for many years his only real rival was Sir ***** *****. In 1831 he was appointed miniature-painter in ordinary to William IV and Queen Adelaide, and from 1837 to 1858 held the same post under Queen Victoria. He was knighted in 1837.Though popular, Newton was never elected to the Royal Academy. He long resided in Argyll Street, London; after his retirement he moved to 6 Cambridge Terrace, Hyde Park, where he died 22 January 1869.