skatr2,

You are correct of course. I modified my previous post to remove any error. I incorrectly read a description of Siyaqat. Thank you for pointing that out.

I have been reading "Guns for the Sultan. Military Power and the Weapons industry in the Ottoman Empire" by Gábor Ágoston.
He points out the wealth of information residing in the chancery records. I wish I knew how best to make use of your very kind offer.

Pete