Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Monumental Earthworks of Poverty Point' has mentioned 'Lead' in the following places:
Occurrence Sentence Text Source
In the 1830s Jacob Walter, an American explorer searching for lead ore in the area, came across Poverty Point and wrote about it in his diary:[50]
On my arrival at the place of my destination, on bayou Mason at which place I had been informed lead ore had been found.
But on examination I soon discovered how the lead ore came to this place.
& with this discovery, all hope of finding a lead mine disapate [sic].
Instead of a lead mine, I found myself on the site of an old Indian town.
Thus disappointed in the discovery of a lead mine, I mounted my horse.