Working files for the paper 'Predation by Tawny owls (Strix aluco) on Bank voles (Clethrionomys glareolus) and Wood mice (Apodemus sylvaticus)', which was published in the Journal of Zoology, 09/1982, Vol.198(1), pp.83-102, co-written with V.P.W. Lowe.

The files include trapping data, correspondence, and a reprint of Southern's paper on 'Morality and Population Control' which was published in Ibis, 07/1959, Vol.101(3-4), pp.429-436.