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Mira Jacob published 90 Delvaux lithographs between 1966 and 1975, so there was scant surprise about the buoyant response to the 39 Delvaux lithographs offered here.

All sold, led by Païolive (1975), a large, signed colour lithograph on vélin d'Arches, one of 100, with the inscription H.C. (hors commerce) bottom left, measuring 23in x 2ft 7in (59 x 79cm) inside broad margins. This went at €8200 (£5580), over double the estimate.

An album of 24 Redon lithographs illustrating the Temptation of St Anthony (1896) made €20,000 (£13,600).

Pick of the books was a two-volume edition of Longus' Daphnis et Chloé, printed in Paris by Tériade in 1960-61, which fetched €270,000 (£183,700) thanks to 42 colour lithographs by Chagall.

Auctioneer Isabelle Bailly-Pommery claimed afterwards that Delvaux and Redon, "whom Jacob promoted and loved," had been "consecrated by international-level prices".

Sotheby's Andrew Strauss who said prices were "pretty much on a par with the international market", added: "Drouot is very French-oriented, so you need to internationalise these sales. Working with another auction house is a challenge, a new way of working, but it worked brilliantly.

"It's a message for everybody. We'll probably see more sales like this in the future."