If a historian wanted to determine whether iron tools can be found?

A historian would examine archaeological sites for evidence of iron tools such as tools, weapons, or debris from smelting. They would also analyze historical records, such as inventories, tax records, or trade routes, to track the distribution and use of iron tools in a specific region or time period. Scientific testing, like metallurgical analysis or carbon dating, can help confirm the presence of iron tools and determine their age.