The Committee expressed concern that the Secret Intelligence Service (MI6) knew the names of some spies years before the publication of the book, but took a decision, without informing the proper prosecuting authorities, not to prosecute them. This decision, ISC believed, was for the Law Officers to take, not the SIS. The ISC interviewed Mitrokhin. He was not content with the way the book was published, he told them, and felt he had not accomplished what he intended when writing the notes. He wished that he had retained "full control over the handling of his material".