HANS S.ERICHSEN

Hello, I am searching for a man who went to the US after WWII. His name is Hans S. Erichsen and he is Norwegian/American. Mr. Erichsen worked at the OSS Westfield Mission in Stockholm Sweden WWII. I am working on a book on this subject and any information on HS ERICHSEN will be of interest. I believe he went to Washington, but I am not sure. The last trace I have of him is from a letter dated December 26.th 1967 but without sender adress. Can anyone help me?