4 adjectives to describe negociation

There was considerable negociation on the subject, and discussion with Lord Lindsay, and on May 9th Airy's Resolutions were accepted by the Council.

After several fruitless negociations, the signal was now made to weigh, and stand closer in towards the town.

I mentioned that I was obliged to set out for Scotland early in the following week, so that if his Lordship should have any commands for me as to this pious negociation, he would be pleased to send them before that time; otherwise Sir Joshua Reynolds would give all attention to it.

The Ariel continued to discharge about fifty shot after all the others had desisted, but with as little avail as before, and thus ended this wordy negociation, and the bloodless battle to which it eventually led.

4 adjectives to describe  negociation