The only diary by HKC to survive is called on the title page "Journal 1838 No. B", which suggests that there was at least one other volume which has not survived. It is not known when the other
volume or volumes vanished.
The other volume here (J/2) is titled MS No. 4 Merton", and is less a journal than a commonplace book. Again, it is not known what happened to the other volumes.