Lesley Abdela wrote about trapping animals in northern Canada by freezing their tongues to blocks of steel (Letters, 19 January). In 1985, John Mortimer revealed on a BBC profile of Laurence Olivier that Olivier got the inspiration for his howl of anguish in Oedipus from the death agony of the Arctic ermine ensnared by salted ice. It's unspeakably cruel - but it doesn't damage the fur!

Kathy Arnold

Beauty Without Cruelty

London N8