Bob, I wonder what the source of her identification is though?
The initials you quoted (JPS) don't seem to match with either the John Thomas Fereday mentioned just earlier in the thread, or with the initials that have been seen on the base of the vases.
From what has been seen and written so far, that doesn't preclude them being made by John Thomas Fereday, because they might have been, and the initials of GLS or GLF seen on the base may also still be a retailer.
There is the other issue of the pattern matching up with a vase seen at the Harrach depository and the link between a Bohemian maker and Whitman which also needs to be disentangled.
m