    ‘Sentence 1: The publisher.sent unrevised bouind proofs from  iWhich'this review was. prepared; unfortunately, there was na  proof of ‘an index, but thé publisher has.assuréd me that  thei will bé oné in the published book, a rather:essential  ingredient of awork with this'title..“    Sentence-2: The publisher claimed there. would be din index  when.the book was published, but he lied.