• We said that a musical instrument called an epigonion was introduced to Greece in AD 180 (13 September, p 23) but the accompanying caption suggested the instrument was played in 440 BC. To clarify: AD 183 is the earliest documented date for the instrument’s existence; 440 BC is the date of the vase in the picture; and tradition has it that the epigonion was introduced to Greece by Epigonus, who lived around 600 BC.
• Flu researcher Wendy Barclay recently left the University of Reading and is now at Imperial College London (20 September, p 8).
