Lots Road Auctions is to expand its range and frequency of sales as it celebrates 40 years in business.

“Germany calling, Germany calling” were the chilling opening words spoken by the upper-class British accent of William Joyce – Lord Haw Haw – and other presenters in propaganda radio broadcasts from Nazi Germany during the Second World War.

A large collection of Rockingham porcelain will be on display at Wentworth Woodhouse next month ahead of its sale at auction. The Rowley collection, numbering 120 lots, was assembled by a collector hailing from Sprotborough, Doncaster, who now lives in Buckinghamshire.

Sir Arthur Conan Doyle (1859- 1930), author of the Sherlock Holmes stories, was so keen to work during his extensive travels that in 1925 he commissioned a case-maker to create a trunk that transformed into a writing desk.

A wealth of objects shelter under the great ‘Asian art’ umbrella – together representing five millennia of artistic endeavour across one quarter of the globe. Here we preview a series of Asian art objects available for sale at galleries and auctions over the next month, and each from a different moment in time or geography. From the cult of Monju to the beginning of a new Japanese imperial era – all tell a compelling tale.

Last week’s on-the-premises sale at Athelhampton House in Dorset was a near sell-out with a hammer price of close to £1.2m.

In the latest of our occasional series of collector interviews, we talk to Graham Bowers, who buys items associated with Napoleon Bonaparte and describes himself as being “under the Corsican wizard’s spell”.

A missing Pugin parliamentary letter box has been returned to the Palace of Westminster more than 100 years after it disappeared.