"Worksheets for yellow pages, the originals having been sent to Nadia for retyping and forwarding to Erskine, for insertion in his master manuscript. These are advanced changes, reflecting the comments and criticisms of others, plus many changes which I always intended making following the submission of the first full draft. These are vital improvements and almost always accomplished their goal of shortening the manuscript or heightening its effectiveness. They can be seen in place in the manuscript and are easy to identify because they are on yellow paper. Changes in yellow pages are typed on blue paper, to help identify them in the collating process."