bathing architecture in f78v

[MarcoP]

I remain convinced that the nymphs (and "baths") are metaphorical, but this image does make it seem plausible that whoever drew the pool pages was at least familiar with (this particular?) Balneis manuscripts.

While some of the "pools" illustrations could be literal, most of the "tubes" don't seem to represent anything realistic. So, I tend to agree with the idea of an allegorical interpretation. Of course, as you write, this doesn't rule out that the De Balneis tradition was a model or at least a source of inspiration.