Who is the “Primary Sub-Source” of the Steele Dossier?

Stephen McIntyre, Hans Mahncke, “Fool Nelson” and “Walkafyre”

After more than three years, the identity of the Primary Sub-Source for the Steele Dossier remains unknown. Key new details were made availabe in the Horowitz Report. In this article, we apply those details to conclude that the Primary Sub-Source was living in U.S. (not Europe or Russia) and was a Ukraine partisan.

https://www.scribd.com/document/452403558/Primary-Sub-Source