Note 151 — INTRODUCTION. (continued 3)

Page 89 in the quarto bears, in the cancelled division, the signature M., and the later page 89 has the signature N. The cause of the difference is plain. It is the ordinary habit to begin the body of a work on sheet B, and reserve the signature A, for the preliminary matter. This is the method adopted with the three previous quarto volumes of Pope's works, and was followed in the original quarto impression of the correspondence; but after the poet had cancelled the beginning of the volume, the sheet commonly marked B was in the second state of the quarto marked A, which occasioned the usual sheet N to become M. The discrepancy is an additional proof that the opening sheets had been cancelled and reprinted.