A collection of Impressionist and post-Impressionist masterpieces – including a rarely seen landscape painting by Vincent van Gogh – which have been hidden from public view for more than half a century, will be going under the hammer this November. The Blaquier-Arrieta Collection has made its global debut in Hong Kong, with a dozen works on show until October 15, before being put up for auction at Sotheby’s in New York. The collection, amassed by the Argentinian businessman Carlos Pedro Blaquier...