It is indeed a gold mine!
I photoed these years ago, copies of the documents were found in Penketh Library, the originals were found in Penketh Chest, then transferred to Warrington library.
Warrington Library
Call Number WMF80
Census returns for Penketh: 1821, 1831
Title Census returns for Penketh: 1821, 1831.
Contents Lists compiled for the 1821 and 1831, giving head of household, and number of persons, with age distribution etc.
Summary General microfilm 63
Local subject 19c, population, vital statistics, name lists, genealogical sources, Warrington districts
Margaret