Duncan honed his exploring, writing and photographic skills in the 1990s through a series of journeys he made with his late father and fellow explorer, Trevor A. D. Smith. Together they criss-crossed their hometown of Sheffield, as well as Yorkshire, the county in which that great city lies. The result was a handful of pioneering books describing not only the major sights but also the strange, curious and unusual ones.
Duncan's solo effort "Yorkshire - A Portrait in Colour" (with stunning photos by Trevor Croucher) was published in 1995 by The Dovecote Press. It garnered considerable press acclaim and still remains in print almost twenty years later.
"Yorkshire has long been known as the ‘most renowned of shires‘. Yet despite its reputation, and size, books on the county tend to concentrate on the Dales and the Moors at the expense of the rest. "Yorkshire: A Portrait in Colour" gloriously redresses the balance, offering a photographic portrait of a county whose range of landscapes and rich historical heritage are without equal in England."