Correspondence arising. Includes papers re the International Bracken Group, 1987-1988. This was established follwoing the 1985 conference by a number of the delegates, including W C and I A Evans, to support bracken research. International Conference on The Bracken Fern, Leeds, 1-5 July 1985. Evans spoke on 'The acute diseases caused by bracken in animals' and I A Evans on 'The carcinogenic, mutagenic and terratogenic toxicity of bracken'. The Proceedings were published in Bracken. Ecology, land use and control technology, ed. R T Smith and J A Taylor (1985). 1985