JohnPhillip: the small glass with the opalescent rings: I also thought it was a James or Harry Powell. However, what confused me is that there is two concentric rings on the foot......and, the owner of it showed me that it is marked Tiffany and is also shown in a Tiffany book somewhere. Fox is very knowledgeable about her cordials/small stems. I looked at it very closely, and the stem portion is a perfect rod with no differentiation in diameter from top to bottom. almost like it was taken from glass rod stock and cut to the right size, then installed between the bowl and foot. Sorry, but I don't have a better photo of it. I could ask the owner to provide a better photo if you want one.
Mr. Vaseline Glass