Adding this as a task for me, long-term, because it needs to be part of the plan for the next phase of the project.
I had pointed JT at fo_925-1650_pt_1_24_vic_harbour_1847, which is Penfold 576, for the Kellett map of Victoria Harbour, but it turns out he wanted Penfold 577, which is fo_925-1807_vic_1848. I've slightly enriched the metadata for 577 using data from ContentDM, manually, but there should be a way to do this mechanically because the ContentDM metadata is organized into clear fields. Ultimately, it would be a good idea to find some way to get at this metadata and pull it into our headers, so we'll have to write a mapping between the two. Here's an example of the ContentDM data in HTML:
It claims to be XHTML, but it's not even well-formed, never mind valid, so it couldn't be parsed with e.g. XSLT unless it was tidied first. Hopefully there's a more helpful feed from it. I'm contacting JD about that.