Whilst you're all considering your responses to my other question, I wonder if anyone has an authoritative source for the dating of nails? I am regularly puzzled by finding dissimilar nails in old bit of oak in my cottage, in that I'll find a round wire nail in the same piece of wood as hand-made cut nails. For instance, all the laths have been nailed on with hand made nails, but some of the bits of scrap wood that the laths are nailed to have been fixed onto studs with round wire nails, but those posts are nailed into place with cut nails. All a little confusing, so I'm after some reading material on the subject.