The collection at one time had its own room at the Museum called The Rhodes Room. This room was partially paid for by a grant from Christchurch Stamp Collectors being the proceeds of the 1950 Canpex National Stamp Exhibition.
The collection itself is accessible for serious philatelic study by asking at the archives room during week days. The collection has been archive photocopied. This set of photocopies is readily available to the public and serious researchers may request to view particular pages from the actual collection depending on the availability of archive staff to assist.
Biography of Sir R Heaton Rhodes can be found at: https://teara.govt.nz/en/biographies/3r14/rhodes-robert-heaton
To view the files of the Rhodes Collection at the Canterbury Museum: https://collection.canterburymuseum.com/objects?query=rhodes&limit=25