Thanks, very interesting. You make good points about secrecy and Watchtower not really tolerating, much less encouraging deep research by members or outsiders.
I tend to agree that their reluctance to engage with the early history is because they know so little about it themselves. It’s not so much that they want to promote a particular view of early characters or events, it’s that they just want to leave it alone. They may be suspicous of people who know a lot about the early history, not because there is anything they specifically wish to hide, but because their lack of knowledge leaves them exposed, should inconvenient facts emerge.
On Watchtower referencing and scholarship, I think one of the better researched and presented publications is the divine name brochure. It doesn’t have footnotes, but it does contain fairly trasparent and useable references in the text itself.
http://da-ip.getmyip.com/PDF/Old%20Publications/1980-1999/1984,%202006%20-%20The%20Divine%20Name%20That%20Will%20Endure%20Forever%20-%20brochure.pdf
On the issue of Adventist roots, I think there are a few things going on. There are those who make the basic mistake of thinking Russell broke away from an Adventist group, or worse from the Seventh Day Adventists. That’s just wrong. And then there are others who lazily think that ideas, such as the view sometimes called “soul sleep”, must have come from Adventists. But many non-Adventists shared this perspective.
However one thing from Adventist remains. It does seem to be the case that Russell initially opposed the popular Adventist idea that accurate endtime chronology could be derived from scripture. Russell’s view on this issue seems to have changed as a result of his meeting with long-time Adventist Nelson Barbour, and from that time forward Russell taught that reliable endtime chronology could be derived from the Bible. It remains a key part of JW teaching to this day. So to the extent that Russell was persuaded by Barbour to ‘give chronology another look’ and subsequently promote the use of endtime chronology, I think it is fair to say that Russell, and JWs have been influenced, via Barbour, by the Adventist movement in this crucial respect.