Hi Jane
Understandably, I am not clear on the various parties' interests that you mention but just wanted to add some details that may or may not be relevant to your research - sounds like you are well underway on this!
Aeneas MacBean, WS - other than being one of the trustees to the will of Mr William, has he any specific relevance to your research?
For example, his death cert will be available to view on the pay to view site
www.scotlandspeople.gov.uk I think his death year is likely to be 1857 in Edinburgh, rather than 1858. What does show as 1858 are his various Will & Testament entries, which again, depending on how he fits in with all of this, may or may not be relevant. From example, from SP, you can view and download the following documents for a small cost:
14/01/1858 - Inventory. 13 pages.
14/01/1858 - Not stated what type of document. 35 pages.
There is also this reference (you can order the photo for free online on the site)
www.gravestonephotos.com/public/gravedetails.php?available=yes&fullname=Janet%20MacBean&grave=60660I was curious (...but then I am always curious!)as to why it wasn't until Aeneas MacBean's death that there then seem to be release of a substial important part of the Williams' collection.
Monica