public override bool OnDroppedOnto(Mobile from, Item target)
        {
            if (target == from.Backpack)
            {
                Item item = from.Backpack.FindItemByType(typeof(GoldLedger));

                if (item != null)
                {
                    from.SendMessage(2125, "You can only carry one gold ledger!");
                    return(false);
                }
            }

            else if (target.IsChildOf(from.Backpack))
            {
                Item item = from.Backpack.FindItemByType(typeof(GoldLedger));

                if (item != null)
                {
                    from.SendMessage(2125, "You can only carry one gold ledger!");
                    return(false);
                }
            }

            return(target.OnDragDrop(from, this));
        }