Hmm. So maybe it's really the 1964 results that are surprising there. Perhaps blacks were allowed to vote a little earlier here than in the Deep South?
Quite plausible.
EDIT: (from some letter on the internet)
"I'd like to share my own impression of John Salter, whom I first saw on a 1963 television newscast being mercilessly pummeled by a group of white men. The attack took place during a Black student demonstration in Jackson, Mississippi [Salter is white and Arizonan. L.T.] A few months later, John appeared in my rural, eastern North Carolina community, where we Black people were staging our own demonstrations.
(...) Salter's civil rights record, his obvious sincerity, as well as his willingness to take on the local racists, soon won over the most skeptical among us. For over a year, he worked in our community, facing daily death threats, abuse, and the virulent hatred of local white people.
With John Salter's help, we initiated a countywide voter registration drive, and when local officials set up obstacles, John convinced a battery of topnotch lawyers to challenge the county board of elections in court. Our side won. For the first time since the disenfranchisement of Blacks in the late nineteenth century, thousands of eastern North Carolina Blacks registered. (...)"
