Complete quote from “Sidney Rigdon: A Portrait of Religious Excess”:

‚Äúthat Rigdon could have been merely “Sidney the Scribe,” a penman whose sole function was to take down dictation, is implausible. A biblical scholar with a reputation for erudition, he was more steeped in biblical interpretation than any other early Mormon, despite his common school education. Any number of Smith’s followers could have served as clerk, but only Rigdon could have functioned as a scribe in the historical Jewish sense of the word: a man of learning: one who read and explained the law to the people.”

–Van Wagoner–