Add to ORKGAage Petersen was Niels Bohr's personal assistant. Along with Bohr, Petersen spent the fall of 1954 in Princeton and he and Hugh Everett III 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. This letter is principally social: it congratulates Everett on his marriage and expresses a hope that Petersen and Everett will find a time to meet when Petersen accompanied Bohr on a visit to the U.S. Petersen passes on the opportunity to respond in detail to Everett's arguments in his previous letter.This document was found in the basement of Mark Everett in 2007 by Mark Everett and Peter Byrne