I am not a legal expert, but the way i see it as long as the owner knows, and gives permission, it is fine. I just asked to make sure. If someone send information on a sword that was "private" or given in confidence then that is different. Also if the item is on eBay or listed for sale it would be good to know, some lists do not allow discussions on such swords as there could be a conflict of interest or it could interfere with the auction (possibly illegal, and cetainly in violation of eBay's -and others- policies).
The sword world is a small group. I have been offered swords that the owner says "you are the first one i offered it to" only to realize i saw the sword before (pictures sent to me by a previous potential buyer), sort of makes things uncomfortabe.
Just like to know what the sitation is, i did not mean to infer bad motive or upset anyone.
Mark J