Argh on the paper
So this may in fact be the dullest paper ever ... athough it's certainly talking about using digitized sources. Well, the ones in databases, at least.
But here's a related question: 'vestitionis' as in 'ecce hic testes illius vestitionis'...
Two very smart people have said that it's probably a livery of seizin. But did such things exist in C9 Francia? Especially in the east?