Ashbel Kitchell writes that Cowdery was an assistant in the translation of the "golden Bible."
Ashbell Kitchell, “A Mormon Interview,” Interview by Ashbell Kitchell, Pocket Journal, May 7, 1831, transcribed, 1
Late in the fall a number of them came to visit the Believers. One by the name of Oliver Lowdree [Cowdery], who stated that he had been one who had been an assistant in the translation of the golden Bible, and had also seen the Angel, and had been commissioned by him to go out and bear testimony, that God would destroy this generation.