The next sentence in the letter reads, “I could not take a chance on reqesting a new visa unless I used my real name, so I returned to the United States.” The fact is that he did use his real name for his tourist card, and in all dealings with the Cuban Embassy, the Russian Embassy and elsewhere. Oswald did use the name of “Lee” on the trip, but as indicated below, he did so only sporadically and probably as the result of a clerical error. In the opinion of the Commission, based upon its knowledge of Oswald, the letter constitutes no more than a clumsy effort to ingratiate himself with the Soviet Embassy. [Illustration: COMMISSION EXHIBIT 15 OSWALD’S LETTER TO THE EMBASSY U. S. S. R., WASHINGTON, D. C. (COMMISSION EXHIBIT 103) PRELIMINARY DRAFT] Investigation of Other Activities _Oswald’s use of post office boxes and false names._--After his return from the Soviet Union, Lee Harvey Oswald is known to have received his mail at post office boxes and to have used different aliases on numerous occasions. Since either practice is susceptible of use for clandestine purposes, the Commission has directed attention to both for signs that Oswald at some point made undercover contact with other persons who might have been connected with the assassination. Oswald is known to have opened three post office boxes during 1962 and 1963. On October 9, 1962, the same day that he arrived in Dallas from Fort Worth, and before establishing a residence there, he opened box No. 2915 at the Dallas General Post Office. This box was closed on May 14, 1963, shortly after Oswald had moved to New Orleans.[C6-594] That portion of the post office box application listing the names of those persons other than the applicant entitled to receive mail at the box was discarded in accordance with postal regulations after the box was closed; hence, it is not known what names other than Oswald’s were listed on that form.[C6-595] However, as discussed in chapter IV, Oswald is known to have received the assassination rifle under the name of A. Hidell and his Smith & Wesson revolver under the name of A. J. Hidell at that box.[C6-596] On June 3, 1963, Oswald opened box No. 30061 at the Lafayette Square Substation in New Orleans. Marina Oswald and A. J. Hidell were listed as additional persons entitled to receive mail at this box.[C6-597] Immediately before leaving for Mexico City in late September, Oswald submitted a request to forward his mail to the Paines’ address in Irving, and the box was closed on September 26.[C6-598] On November 1, 1963, he opened box No. 6225 at the Dallas Post Office Terminal Annex. The Fair Play for Cuba Committee and the American Civil Liberties Union were listed as also being entitled to receive mail at this box.[C6-599]