Papers of Professor J. N. Hutchinson, 1940-1996, comprising reports on the Aberfan tragedy including Geotechnical investigation into the causes and circumstances of the disater of 21st October, 1966 , by the donor and others, together with a very rare copy of Rubbish Tip slide, Cilfynydd Common 5 December 1939 (1940), and an offprint of an article by him and others entitled 'Rapid failures of colliery spoil heaps in the South Wales coalfield', Quarterly Journal of Engineering Geology, 1996.