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A piece of Russian porcelain and an Asian painting raised most interest at West Country auctioneers Tamlyns (18% buyer’s premium) on March 8. However, a 13in long (34cm) gouache scroll painting of magpies and prunus was considerably more of a surprise.

Much like René Lalique, Louis Comfort Tiffany’s successful career as a glassmaker overshadowed his genius as a goldsmith. Both men created jewellery that have come to define Art Nouveau in France and North America.

This pastel portrait by Maurice Quentin de la Tour is the potential star of the auction taking place at Drouot held by Kalck & Associés.

The rivière – one of the most popular and enduring styles of necklace to come out of the Georgian period – features an endless line of matched or subtly graduated gems set within inconspicuous collets. However, as Marielle Whiting at Woolley & Wallis of Salisbury points out, seldom are they equals.

A 600-lot sale devoted to Asian art held by Tremont auctions in Newton, Massachusetts, on April 23 will include a 4ft (1.2m) high vase made in the late 19th century.

A carte-de-visite album of the 1860s containing a previously unknown photograph of the abolitionist heroine Harriet Tubman was one of the high points of the March 30 sale held by Swann (25/20/12% buyer’s premium).

Waterhouse & Dodd’s upcoming exhibition focuses on the influence of David Bomberg’s (1890-1957) paintings on a wide circle of artists.

Otto von Guericke’s Experimenta nova (ut vocantur) magdeburgica de vacuo spatio… of 1672 describes the experiments in which he produced an air pump able to create a vacuum and thus demonstrate the pressure exerted by our atmosphere.

A collection of ethical maxims, proverbs and moral reflections compiled by Solomon ibn Gabirol and translated from the Arabic by Judah ibn Tibbon was printed for the first time in Venice in 1484 as Mivchar HaPeninim (Choice Pearls).