Hazlitt . "I know it well, and have read it with great admiration."— Richard Grant White . "Cobbett's Grammar is probably the most readable grammar ever written. For the purposes of self-education it is unrivaled."— From the Preface. Mr. Ayres makes a feature of the fact that Who and Which are properly the co-ordinating relative pronouns , and that That is properly the restrictive relative pronoun .