Thanks to Google you can find any piece of information you could find 10 years ago.
I suggest if any of you Powderly researcher are still researching TV Powderly to look at the small write up on him on JSTOR.org
It turns out T.V. Powderly wrote an Autobiography and told a friend about it in 1907. It's called "This is my Birthday" The write up mentions he served on the Noble Order of the Knights Labor from 1879 to 1893.
Since T.V. Powderly aka Terrence Vincent Powderly is the name you are searching for and he has the same name but the dates may be off perhaps he is the father of the T.V. Powderly you seek. I suggest just try looking up information on this Powderly to see if He mentions any names that sound familiar to you.