Letter and Draft Letter The Chairman of TC 2 R.Mason expresses in a letter his sadness with regard to A.P.Ershov's illness. A manuscript draft by Ershov contains his thanks and hopes to participate in the coming Munich working conference. Date: 16.09.1985- 12.10.1985 Original document language: English Persons: Anatoli Alekseyevich Dorodnitsyn, Andrei Petrovich Ershov, Richard E. A. Mason