December 23, 1974 Dear Janet: Thank you for your note. We haven't yet used the cells you sent to Ching-Juh, but in view of your results we better compare them to ours. Perhaps our respective viruses have adapted to the individual cell lines. I am enclosing a copy of Bill Brockman's and Theresa Lee's Cold Spring Harbor paper and also Ching-Juh's. Each of them is now completing a paper, and I'll send you preprints when they are ready. Also, when proofs of the review arrive (expected within the next two weeks), I'll send you a copy. Sincerely, Daniel Nathans