Add to ORKGAage Petersen was Niels Bohr's personal assistant. Along with Bohr, Petersen spent the fall of 1954 in Princeton and he and Everett became friends. As someone close to both Everett and to Bohr, Petersen was one of Everett's principal correspondents concerning the relationship between his work and the Copenhagen interpretation. Since he considered Petersen a friend, Everett was often more informal and frank about his appraisals of the Copenhagen response to his thesis in correspondence with Petersen than with other Bohr acolytes. In this letter Everett responds testily to Petersen's criticisms of his and Wheeler's preprint, as expressed in Petersen's letter of April 24, 1957.This document was found in the basement of Mark Everett in 2007...