Joanna Gilmour writes about the portraiture of the colonial artist William Nicholas.
At just 7.8 x 6.2 cm, the daguerreotype of Thomas Sutcliffe Mort and his wife Theresa is one of the smallest works in the collection of the National Portrait Gallery.
Encompassing the 1820s to the 2020s, Time and Line showcases the depth and extent of our drawing collection.