The prophet Isaiah is quoted or referred to some eighty-five times in the New Testament. But several passages are cited or alluded to more than once; so that sixty-one separate passages are referred to in these eighty-five New Testament citations.
  Of these sixty-one passages in Isaiah, it will be noticed that twenty-three are from the alleged "former" part of Isaiah (chapters 1-39), and are cited thirty-two times; while thirty-eight (the larger number) are cited from the alleged "latter" part (chapters 40-66) which is most called in question by modern critics. These sixty-one passages are cited eighty-five times.
  The following table exhibits the whole; and the evidence hereby afforded, as to the unity of the authorship of Isaiah, may be added to that already given in Appendix 79:—

(The alleged "former" part)
 

  
  The eighty-five citations or allusions are distributed as follows: In Matthew there are nine; Mark, six; Luke, five; John, five; Acts, five; Romans, eighteen (eight from the "former" part, and ten from the "latter"); 1Corinthians, six; 2Corinthians, four; Galatians, one; Ephesians, two; Philippians, one; 1Thessalonians, one; 2Thessalonians, one; Hebrews, two; James, one; 1Peter, five; 2Peter, one; Revelation, twelve (five from the "former" part, and seven from the "latter").
  Twelve books give six direct quotations.
  Eighteen books contain eighty-five allusions to Isaiah.
  Only seven books out of twenty-seven have none.
  The greater part of the New Testament is concerned with establishing the genuineness and authority of the book of the prophet Isaiah, and its one authorship. (See Appendix 79.)