John Waller was born in Spottsylvania County, Virginia, on December 23, 1741, and was a descendant of the honorable family of Wallers, in England. His profanity acquired for him the name of “swearing Jack Waller,” and his general wickedness that of the devil’s adjutant. He was especially bitter against the Baptists, and was one of the grand jury that persecuted Lewis Craig for preaching. Mr. Craig’s meek address to the jury arrested his attention and touched his heart. For seven or eight months his agony and remorse were intense. At length, having found peace in believing in Jesus, immediately he conferred not with flesh and blood, but began to preach the faith which he had destroyed, serving the Lord with greater zeal, if that was possible, than he had served Satan. Traveling through many counties, he attracted crowds of hearers and made many converts.
He preached 35 years, baptized more than 2,000 persons, assisted in ordaining 27 ministers, and in constituting 18 churches, and stayed 113 days in four different jails, and he was repeatedly scourged in Virginia. He now rests from his labors, and his works followed him.
William Cathcart, The Baptist Encyclopedia