Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mammoth Cave National Park' has mentioned 'Bishop' in the following places:
Occurrence Sentence Text Source
Stephen Bishop, an African-American slave and a guide to the cave during the 1840s and 1850s, was one of the first people to make extensive maps of the cave, and named many of the cave's features.
Stephen Bishop was introduced to Mammoth Cave in 1838 by Franklin Gorin.
Gorin wrote, after Bishop's death: "I placed a guide in the cave xe2x80x93 the celebrated and great Stephen, and he aided in making the discoveries.
In 1839, John Croghan of Louisville bought the Mammoth Cave Estate, including Bishop and its other slaves from their previous owner, Franklin Gorin.
With the assistance of Stephen Bishop, a Mammoth Cave Guide, Kxc3xa4mper produced a remarkably accurate instrumental survey of many kilometers of Mammoth Cave, including many new discoveries.
Absent the data from the Croghan's secretive surveys, performed by Kxc3xa4mper, Bishop, and others, which had not been published in a form suitable for determining the geographic extent of the cave, it was now conclusively shown that the Croghans had been for years exhibiting portions of Mammoth Cave which were not under land they owned.