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“That ability for the live auctioneer to connect with bidders, whether they're in the room or online, is a pivotal ingredient to successful auctions."

Richard Lewis, COO of Auction Technology Group, who was one of the judges at the NAVA Novice Auctioneer of the Year competition this week, on a winning style.

“By examination under special filtered infrared light, we were able to detect the hidden figure of Helios, revealing a major change in the composition that proves Mantegna’s authorship.”

Cristiana Romalli, senior director and Italian specialist in Sotheby’s Old Master drawings department, on the use of technology to reveal the hand of the Renaissance master in a rare drawing.

“This enigmatic work by Sydney Curnow Vosper is one of the nation's treasures and I look forward to sharing it with the people of Wales and beyond.”

Pedr ap Llwyd, chief executive and librarian of the National Library of Wales on its purchase of Salem by Sydney Curnow Vosper at Rogers Jones.

“The single most important addition to our 16th century paintings collection in three decades.”

In another acquisition story, Getty director Timothy Potts reacts to a Bronzino painting recently added to the museum’s collection.

“This van Dyck discovery is an especially important one and unequivocally proves the value of this innovative use of digital technology to share and grow knowledge.”

Andrew Ellis, director of Art UK, an online initiative to catalogue all public artworks, on the identification of a portrait as the work of Anthony van Dyck.

“There is a strong market in the United States for anything that pre-dates or relates to the discovery of modern America... The fact that the North American coastline is inaccurate based on what we know today gives a fascinating insight into how cartography developed through exploration and the establishment of trade routes.”

A map left at a charity shop proved to be the work of John Speed and was vied for at auction. Mark Yuan-Richards, works of art specialist at Woolley & Wallis, explained its appeal.