So far the cover could use some work.
Really wanted to create a book for this material as I haven't found one that covers it, of course, Michael Sherman briefly went over these types in his Guide, but a full book is always nice.
Some were recorded domestically, some were recorded from G&T/Victor agents sent to China around 1902~, Columbia also did the same. Eventually, Victor stopped doing domestic recordings all together (though I can't find as to why?), & thanks for the article, I need some sources.