Births: Sir Francis Beaufort, admiral and hydrographer, 1774; Isadora Duncan, dancer, 1878; Samuel Dashiell Hammett, detective story writer, 1894; Vincent Leonard Price, actor and writer, 1911. Deaths: John Calvin, theologian, 1564; Niccolo Paganini, violinist, 1840; Jawalharlal Nehru, statesman, 1964. On this day: the Habeas Corpus Act was passed, 1679; St Petersburg (Leningrad) was founded by Peter the Great, 1703. Today is the Feast Day of St Augustine of Canterbury, St Eutropius of Orange, St Julius of Durostorum, St Melangel or Monacella and St Restituta of Sora.
National Gallery: Duncan Robinson, "The National Gallery and `the Honourable Distinction of an English School' ", 6.30pm.
British Museum: Richard Woff, "Drinking Wine in fifth-century Athens", 11.30am.
Wallace Collection, London W1: Jennifer Stern, "Introduction to Sevres Porcelain", 1pm.