Presidential Archive of the Russian Federation, f. 3, op. 3, d. 65, l. 32.
Captain 1st Department of the Scientific Research Chemical Institute of the RKKA
17 October 1935
It was revealed upon examination of the envelope:
A trace of the substance was not complely preserved on the envelope and the possibility of conducting a thorough chemical analysis is excluded.
The envelope emits a weak smell that is a distant resemblance to excrement or a meat product (intestines used in the production of sausage or similar).
It can be assumed that the specimen that is contained in the envelope (in certainly possible it was wrapped in still another paper) is of animal origin, however to what degree cannot be considered proven.
Captain 1st Department NIKI RKKA
This document was published in Istochnik, 3, 1993.