The vet that had looked after him all his life came out for a housecall, as he stresses very badly at the clinic.
Bear and I cuddled for an hour in the sunshine while we waited for the vet, and then he slipped quietly into sleep in my arms.
He had feline ideopathic ulcerative dermititis. Or vetspeak for non-healing skin ulcers of unknown cause.
There is a Bear shaped hole in the household tonight.