Thanks for the additional scan.
Tachyon Publications had this interesting bit of info about The Black Flame manuscript.
When The Black Flame was first published in 1939, Stanley G. Weinbaum had already been dead for three years. By that time, over 18,000 words had been excised or edited from the original manuscript. The intact manuscript, held by Sam Moskowitz, was auctioned off to Forrest J. Ackerman at the First World Science Fiction Convention in 1939. It was subsequently stolen from his collection and never recovered. The publication of this edition was made possible by the discovery of a carbon copy of the manuscript in a trunk of Weinbaum's papers found in the basement of his grandson's house in Denver, Colorado.
This is not the first time you and I have pursued parallel tracks of investigation at the same time! Fascinating info!