Harry Johnson is one of the most influential bartenders in history. His biography seemed to be clarified. However, I have found previously unknown official documents, due to which his biography must be rewritten. From the documents of his wife Martha it appears that Harry Johnson must have been married at the same time not only to her, but also to his first wife Bertha. In any case, the official documents do not allow any other conclusion. Read more about this at https://mixology.eu/harry-johnson-berlin-neue-erkenntnisse/.
For my English-speaking readers, please note: More questions have arisen and I amcontinuing to research. Once the research is complete, you’ll read everything in English translation on my blog. If you are very curious, I kindly ask you to translate the post on Mixology with https://www.deepl.com/translator, because all the important documents are quoted in it.