From Narrative of the life of Frederick Douglass

From the text:

It was called by the slaves the Great House Farm. Few privileges were esteemed higher, by the slaves of the out-farms, than that of being selected to do errands at the Great House Farm. It was associated in their minds with greatness. A representative could not be prouder of his election to a seat in the American Congress, than a slave on one of the out-farms would be of his election to do errands at the Great House Farm. They regarded it as evidence of great confidence reposed in them by their overseers; and it was on this account, as well as a constant desire to be out of the field from under the driver's lash, that they esteemed it a high privilege, one worth careful living for.

Being chosen to run errands to the Great House Farm was a great honor and responsibility. It meant they were esteemed by their overseers, trusted, and afforded great priviledge. The honor kept them from whippings.