To make marmalade you need Seville oranges, sugar, water, a juicer, a sharp knife for slicing all the peel - and a good few hours. But as it is made only once, maybe twice, in January, the results - which last all year - repay the investment. Making Marmalade (1958, Museum of New Zealand) by Bernard Dunstan (1920-2017) captures the pleasure of unhurried preparation.