The answer would be opium (a drug) to trade for tea because the British didn’t want to pay silver for it and had lead to the opium wars which China had lost.
On October 7, 1763 King George issued a Proclamation nation that forbade colonial settlement west of the Appalachian mountains. In so doing, he hoped to placate Native Americans who had sided against him during the recently concluded seven years war.
It was the Inca that used mortar to fit giant stones together,