Why did Drederick Douglass owe debt to photographer john white Hurn.

My great-great-grandfather John White Hurn— who would later become a well-known portrait photographer—was working as a telegraph operator at the time in ... Frederick Douglass photographed by John White Hurn.

Explanation:

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.