AMERICAN: I was just now at your Embassy and they took my address.
SOVIET: I know that.
AMERICAN: [Translator comment: speaks terrible, hardly recognizable Russian] I did not know it then. I went to the Cuban Embassy to ask them for my address, because they have it.
SOVIET: Why don't you come again and leave your address with us. It is not far from the Cuban Embassy.
AMERICAN: Well, I'll be there right away".
If the hypothesis of Oswald in Mexico City for visa proceedings were true, it's to be expected that he would have gone right away to the Soviet Embassy. He didn't come ever again. This was incontrovertibly stated by Valeriy Kostikov and Oleg Nechiporenko, two Soviet officials who dealt with Oswald that very Saturday before noon at the Soviet Consulate. They also claimed that no outsider could have placed that call, because the switchboard was closed (Passport to Assassination, Birch Lane-Carol, 1993, pages 75-81).
The transcripts corroborate that all the callers that Saturday, except " Duran," were people with friends or relatives at the Soviet Consulate. Furthermore Sylvia Duran (née Tirado), a Mexican employee at the Cuban Consulate, consistently denied having made such call. She was arrested and harshly interrogated by the Mexican Police on November 23 and November 28. The info taken from her included that "she had no fear [of] extradition to the United States to face Oswald" (page 13). Surprisingly, the CIA had fear [of] "any Americans to confront Silvia DURAN or to be in contact with her" (page 16).
Neither the eyewitness [Duran] nor the ear witnesses [CIA transcribers Boris and Anna Tarasoff] were ever questioned about the call by the WC. The info developed by CIA barely stated: "We deduce that OSWALD visited the Cuban Consulate [again] on September 1963 (") This may well have been 28 September, but we cannot be certain of this conclusion" (page 3).
It's surprising not only that the CIA didn't trust its own LIENVOY evidence, but also that such critical wiretapped call by "Duran and Oswald" was omitted in the September LIENVOY Report, even though COS Scott wrote it after having notified an intriguing October 1 call to Headquarters. To cap it all, the CIA " Responses to Questions Raised by [HSCA] to Richard Sprague " included that "the Station went onto say that it was unable to compare the voices in the two conversations because the tape of the first conversation (September 28) had been erased before the second call (1 October) had been received" (page 33).
Page 38. October 1, 10:31 hours. To phone number 15-69-87. A man outside (MO) calls the Soviet Military Attaché Office speaking in broken Russian.
MO: "Hello, I was at your place last Saturday and talked to your Consul. They said they'd send a telegram to Washington and I wanted to ask you if there is anything new?
SOVIET: I'd like to ask you to call another phone number.
SOVIET: Please write it down; 15-60-55 and ask for a Consul.
MO: Thank you.