Volumes 1- 3 also available. The books have music notation for a large number of tunes.
If my guess is correct the tunes for the clock, other than the hymn(s) perhaps, may have been found in books like these volumes and the other tunes may also be in the same book.
By reading through the tune titles on the index pages it's possible that someone might recognise the clock tunes. Maybe it's a long shot, but it could be a starting point for the search.
I found a few tunes which I know about abut didn't realise how old they were.
I haven't looked yet for the other books I mentioned above.
An aside: These digital archives are a treasure trove. I love libraries!!! Thank you librarians and library staff for the wonderful work you do. (I shouldn't have quit my job as a librarian back in the late '90's. Big mistake!)