The Roseville Noisette possibility is interesting. I did a "white cluster" search at HMF, and there's a listing for Youngher's White Cluster described as a Noisette with a height of 3 feet. But there's no date or info about Youngher. HMF calls it a found rose, so I'm assuming Youngher found it, and this is a study name, not named for the hybridizer.

An internet search for Youngher's White Cluster brings up an article by Jim Delahanty about the Noisette Collection at Riverbanks Zoo and Botanical Gardens in South Carolina. They had a Youngher's White Cluster there. It would be interesting to compare Roseville and Youngher's to see if they're the same.

The truth is, the DNA of all of these cluster-flowering Noisettes is so close, one-to-the-other that they seem to be all-but-identical at that level. It's unfortunate that Roseville wasn't included in the big Noisette Study in 2009. And I can't recall if Roseville was among the Noisettes of which I sent cuttings to the Hampton Park Noisette Study Garden in Charleston.