One reason historians can rely on government records for accurate historical information is because the information presented in government records has been verified by those who collect it.
In 1733 John Kay with a "Flying Shuttle" or in 1765 James Hargreavers with the "Spinning Jenny"
I believe the answer is: <span>ethnographic authority
</span><span>ethnographic authority refers to the people who are considered as reliable experts in understanding a certain culture.
People with </span><span>ethnographic authority would most likely have to spent some times assimilating with the foreign culture in order to deepen his/her understanding about the traditions in that culture.</span>