What is Proofreading? Nineteenth-century author and journalist Samuel Langhorne Clemens, better known by his pen name Mark Twain, had an ambivalent attitude towards proofreading and proofreaders: “Yesterday Mr. Hall wrote that the printer’s proof-reader was improving my punctuation for me, & I telegraphed orders to have him shot without giving him time to pray” (1889). … Continue reading Proofreading