Mark was educated at Goldsmiths College, London, and joined Christie’s South Kensington in 1993, where he worked in both the Book and Scientific Instruments Departments. In 1997 he moved to Sotheby’s, where he was responsible for the general book sales section, and then in 1999 returned to Christie’s, where he was a specialist and later Associate Director in the King Street Book Department. At Christie’s Mark worked on a number of major auctions, including those of books from the libraries of William Foyle, Beriah Botfield, Quentin Keynes, H.R.H. The Prince Henry, Duke of Gloucester, and P.R. Sandwell.
In 2007 Mark left Christie’s to head the travel book department at Henry Sotheran Ltd, where he issued general travel catalogues, and also specialist catalogues on works by Charles Darwin and Margaret Mee, and the Napoleonic libraries of Bryan Forbes and Karen Hunt. Mark is a Fellow of the Linnean Society, and joined Quaritch in 2013, where he has issued three further catalogues on Napoleon, and specialises in travel, natural history, and human sciences.