
The collection in the site museum at Chesters Museum was formed by John Clayton (1792-1890) [ODNB]. He inherited the Chesters estate in 1832. The museum opened in 1903. The original layout was by the Egyptologist Sir Wallis Budge (1857-1934).
ODNB notes, ‘In the early twenty-first century the Clayton collection at Chesters Roman Fort and Museum—under the care of English Heritage—remains an internationally recognized site of Roman history and Victorian collecting practices’.

Tucked inside my MPBW guidebook is a paper guide to the museum by Grace Simpson, the Honorary Curator. The sections include: History of the Museum; The Inscriptions; The Building of Hadrian’s Wall, with sub-sections on the Centurial Stones, Milecastle Inscriptions, Fort Inscriptions, Chesters Garrisons, The Second Ala of Asturians; Religious Sculptures, with a sub-section on Tombstones; Objects in the Show-Cases, with sub-sections on the Chesters Diploma, the Clayton Corn-Measure, the Water-Mill Stones, and Roman Flooring. The guide was printed by the Oxonian Press, Oxford.

Is it possible for the whole document to be made available as a pdf online?
The copyright belongs to the Trustees of the Chesters Museum.
Thanks for the information.
Contact me at https://people.uea.ac.uk/david_w_gill