I asked on reddit but ended up finding the answer on my own. " The note box has been cut out, indicating perhaps an intended revision that did not occur." per

I asked on reddit but ended up finding the answer on my own. " The note box has been cut out, indicating perhaps an intended revision that did not occur." per https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~303570~90074177:Tavola-XIII-Che-Ha-Sua-Superiore-La?qvq=q:author%3D"Monte%2B(Monti)%2C%2BUrbano%2C%2B1544-1613";lc:RUMSEY~8~1&mi=21 https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~3... so it's anyone's guess really