Found something more, Pat.
Source is this site (may want to turn monitor brightness down before clicking), Hyland's contract is last item on the page:
http://w.ringmemorabilia.com/Recent%20Adds.htm
Interesting stuff here. Unlike the Ball Letter, this says nothing about him appearing on a cigarette card specifically, just general use of a photograph. No compensation is offered. Letterhead gives us a couple more names to look into.
The September 1909 date is pretty far in advance of his cards appearing. Hyland is in T225-1 and T218-1. The boxing set print dates in the Old masters general must be for T225-1. T218-1 was done after February 7, 1910 but probably before July 4, 1910. Both sets were right about the same time. I believe T220 was not really intended as a separate set, but was thought of as part of T218 (note its matching but odd series name). Presumably his rights here were used for both sets. His T218 was cloned in C52, but was one of the 12 fighters cut from T219.
This letter bears Fulgraff's signature, but on Brett Lithographic letterhead, not Old Masters. Fulgraff's ledger includes information from long after this (like T223), and also from decades before, so him switching jobs between the two in this period doesn't seem to fit. They are probably the same company, or subsidiaries of the same parent. I think this would suggest the likeliest scenario is the less-shocking one, that it was indeed an ATC/American Lithographic partnership and these are quiet subsidiaries; cards printed at multiple locations but not by multiple independent businesses.
Not to make everything about T206, but this also strikes me as increasing the probability for why Wagner's card was pulled. Unlike the Ball Letter, this letter doesn't mention or imply tobacco whatsoever. If Wagner had signed a release like Hyland's instead of like Ball's, it would explain more realistically how they started production on his card and then Wagner asked them to stop once he found out what his image was actually being used for.
Fulgraff appears to have had quite a central role in several decades of tobacco premiums. I've never encountered his name before the Lelands Ledger. I will keep digging. There may be something in the library and archival systems, a lot of businesses and businessmen's papers simply disappear, but a lot from this time period actually ended up in storage or basements at some library, archive, or university. New York is littered with them, may be another avenue.