Dear Gorb, stuck, GXJW,
Thanks for the kind words. Yes, our research is as exhaustive as we can make it. That consumes time and effort. Sometimes [often] we're left with questions we cannot answer. Missing original documentation is a real problem. As we continue to write this chapter, we find ourselves without two key items: 1. Russell reprinted Food for Thinking Christians and Tabernacle Teachings as a single combined book. We have copies of both in their original format. We need to see the title page, copyright page, and after-matter of the combined booklet. But we can't find a copy anywhere. 2. In 1887 Russell printed a small booklet of suggestions for Watch Tower evangelists. We can't find that either. We have something similar printed in 1912, but we do not think the content is the same.
If anyone has these things, do PM me.