Is the VMS homogeneous or a composite work?

[Emma May Smith]

Medieval works were much more prone to being 'composite' than modern works. They may have drawn together multiple sources, expanded a single source with new material, edited down a longer source, been a free translation, or even had multiple different authors over generations. Now, that's a slightly different answer than whether they had a single 'theme', but I suppose the short answer is that we shouldn't count on the document being as coherent as we modern folk expect.