Adam Sweeting references the three classic US rock festivals of the 1960s at which Jefferson Airplane performed (Marty Balin obituary, 1 October). JA also played at the Bath Festival of 1970, progenitor of the Glastonbury series, at which they were famously rained off halfway through their planned set.
• Sexist setting, as spotted by Fiona Collins (Letters, 29 September), is unfortunately not confined to the quick crossword. The prize puzzle on 22 September had “Star men” as the clue for “Astrophysicists”. It’s not as unjust as Cecilia Payne-Gaposchkin, who discovered that stars are mainly composed of hydrogen and helium, missing out on the Nobel prize. But it’s still not right.