Analysis of information sources in references of the Wikipedia article "Berghof (residence)" in English language version.
For example, in 1938 Fitz-Gerald wrote "Hitler's Mountain Home" for Homes & Gardens. It was written in a tone which has been described as "breathless... Hello!-style." The photographs had all been taken by Heinrich Hoffmann (many of them years earlier) and given to the magazine as publicity handouts. The article happened to surface in 2003 after decades of obscurity, see the Guardian reference below.