1871 census
“cellar under 18 Buckingham Street” [the address that Phoebe Wright gives at her wedding]
William Henry Wright, widower, 50, waggon driver, b Liverpool (also everyone below)
William Henry Wright, son, 20, [v faint, possibly ditto marks for occupation]
Julia Wright, 15, daughter, housekeeper
Sarah Helen Wright, 11, daughter, scholar
Julia Wright 15 is possibly Phoebe. I can find various records for the son and the other daughter, but nothing at all for this Julia.
In 1871, all of the houses in Buckingham Street seem to be recorded as separate households at the main address and at the cellar address.