Dear Mr Denbigh
I have seen your query and I have some information you may find useful. I have not been able to track down your Marek Lange, but I have access to the archives at Hrodna where such information may be kept.
I am an archivist here in Minsk, and I have access to many papers relating to the last war. Your talk of the Auxiliary Police Battalions brings bad memories to those of us whose families lived through the war. I have attached a picture — you can see the original in our museum here, the Museum of the Great Patriotic War. This is what happened in Minsk, under the rule of the Nazis. This is what the ‘volunteers’ did.
If you should ever travel to Belarus in the course of your researches, I would be happy to assist you in any way.
Yours most sincerely