LETTERS OF EDNA ST. VINCENT MILLAY (384 pp.)Edited by Allan Ross MacdougallHarper ($5).
In February 1902, Publishers Harper & Brothers got a letter from a nine-year-old New Englander: "Gentlemen: I wish to subscribe for Harpers Young People and here enclose $2.00 for that purpose. I wish to begin with the next number and so have written as soon as I found your residence by reading one of your books."
Forty-four years later the same correspondent wrote to Harper's Board Chairman Cass Canfield: "This [alter one word of my poems] you must never do. Any changes which might profitably be made in any of...