I have received two versions of the same print from Roger Cole. This is actually my favorite theme - photos of musicians playing. It's amazing how different the two prints feel. My favorite is the one on Arista Silver Artist paper. At first I thought this is a platinotype. It looks really stunning! A perfect match for the photo.
On your comment about toning Arista paper: I guess it is a cold-tone emulsion if it resists brown toner. I would try a two-step brown toner on it. Bleach it first and then tone it. It should work.
Once again, thank you very much Roger, that was a nice surprise!