The deceased was a Russian by birth, and therefore excitable

He did not attempt to disguise his own opinion, which was that the deceased had taken his own life. ... Various motives had been suggested, and the jury must bear in mind that the deceased was a Russian by birth, and therefore excitable, and liable to be overcome by feelings of melancholy and despair. He himself  had read a great deal of Russian literature and could assure the jury that suicide was of frequent occurrence among the members of that unhappy nation. We who enjoyed the blessing of being British might find that difficult to understand, but the jury could take it from him that it was so.

D.L. Sayers, Have his carcase (1932),  277