Sorry, but I don't have a link for the article, it was in one of the UK publications, Cycling Plus, possibly. BikeRadar is their website, so you might find something there. I had a subscription for a few years, and it was there. if I find it I'll gladly send you the citation so you know the edition and volume that it was in. Nothing really detailed, but it talked about the ratios and its engineering, I want to say it was an Alfine, but I don't know their IGH nomenclature well.

Thank you for your input about the IGH, and the history, you seem to be quite knowledgeable about them, as well as many other aspects of cycling.

Bill