Copenhagen, 10 August 1917. "The Russian newspaper Riech for 20 July announced that two German General Staff officers called Schidicki and Luebers had told Yermolenko that Lenin was a German agent. It also said that Jacob Fürstenberg and Dr. Helphand (Parvus) were German agents acting as intermediaries between the Bolsheviks and the Imperial governmennt.
"I consider it essential, first of all to discover whether these German General Staff officers, Schidicki and Luebers, in fact exist,* and then, if at all possible, categorically to deny the report in Riech."
(Minister Brockdorff-Rantzau, telegram to the Foreign Ministry.)* Kerensky gives somewhere that the two officers Schidicki and Luebers did in fact exist. However, their information was of marginal value, the key sources having been other parties.
The article in Riech was (apparently) written by Vladimir Bourtseff ; the copy I have seen contains no mentions made of said officers — but the copy was edited which means that anything in it could have been omitted. Anyhow, the question of the two officers is hardly relevant (except for one's not being misled by possible marxist-leninist or other propaganda where irrelevant detail can be often amplified and the important data omitted.)
Bourtseff had (apparently) got his information from Pierewiazev (Pereversev) — said information coming from certain French sources.
He was reckoned to be one of the best-informed authors Please see V. Bourtseff, Le Trahison de Lenine which was published in Paris circa 1920 (or 1922) (if you can find it). — (WPT)Berlin, 18 August 1917. "The suspicion that Lenin is a German agent has been energetically countered in Switzerland and Sweden at our instigation." etc.
(Under State Secretary Bussche, telegram to the Minister in Copenhagen Brockdorff-Rantzau.)