Evidence is accumulating that the enemy is manufacturing a vesicant other than
mustard (HS) and lewisite (MI). It is almost certain that this substance is of the
same type as one which is known to have been the subject of enemy experiments for
some time. It appears that one center for the manufacture of this new vesicant is
in Poland. At least one new projection device has been captured by the Russians.
Unusual interest in civilian anti-gas defense is also to some extent a seasonal
manifestation. The Spring of 1941 saw great activity in western Germany. It now appears
that there is considerable activity in this direction in Berlin, eastern Germany and
in Poland.
(M/A Report, London, No. 47531.)