The good news is that ordering the marriage certificate for delivery to a cousin in England allowed me to see the information on it within a couple of weeks of ordering -- much faster than waiting for it to arrive by snail mail from the other side of the world.
The certificate names the bride as Emma Stanley Price and her father's name is correct, although his occupation is given as commission agent. His will identifies him as a silk merchant, which I guess could be considered a commission agent in a roundabout way. He died when she was about six years old, and by the time she married, her mother had also died, so she might have been guessing.
The marriage witnesses were not family members, alas, but they do add detail to the story. I've since discovered that her brother outlived her, although I don't know for how long.
So the answer is yes, she is the Emma Stanley Price I'd been searching for.
Thank everyone, for your interest and suggestions.
Liza
