When questioned by counsel for the prosecution the witness Mettbach stated (Tr. pp. 9737-8):
“Mr. Hardy: Were there any foreign nationals—that is, men other than Germans—used in these experiments?
“Witness Mettbach: Austrians and Burgenlaender and some from Upper Silesia and East Prussia.
“Q. No Czechs?
“A. No.
“Q. No Russians?
“A. No.
“Q. No Poles?
“A. A couple of them talked Polish but I think they came from Upper Silesia or East Prussia. That very often happens. Lots of Upper Silesians can talk Polish.”
When questioned by counsel for the prosecution the witness Joseph Vorlicek stated (Tr. p. 9388):