I had this experience when trying to decide on my undergrad final project - I had what I thought was a really interesting idea, but it was immediately shot down by my advisers due to so few papers being published about it.
I'd never really come across any undergrads who had to travel to consult original texts and archives - that's what a typical PhD or MRes student would do. I feel like she wrote that action point for the sake of it, because she just fancies having a look at these things, rather than for their academic benefit. I feel like she thinks she'll get extra marks for getting these sources cited (because those will make her look like she's gone the extra mile), but will ignore the obvious texts that are expected by an academic reader. How can she know that she'll need those sources before she's even pinpointed her project area?
At undergrad level, you aren't expected to reinvent the wheel, so Ruby might be in for a shock if she's trying desperately to be original and publishable. This could one of those times where she tries way too hard, when a 'doing what is needed to get a 1st' approach would be completely reasonable (and recommended I'd imagine), and then gets a mark that doesn't reflect the effort she put in. A dissertation can be ridiculously imaginative, but if it doesn't actually hit the main research criteria well enough, it will never get the high marks.