Despite her extensive research, she concluded "it is impossible to say who wrote the Zinoviev Letter", though her best guess was that it was commissioned by White Russian intelligence circles from forgers in Berlin or the Baltic states, most likely in Riga.
A pesar da súa exhaustiva investigación, concluíu que "é imposible dicir quen escribiu a Carta Zinoviev", a pesar de que a súa opinión é que foi encargada polos círculos da intelixencia do movemento de 'rusos brancos' a falsificadores de Berlín ou das repúblicas bálticas, probablemente, en Riga.