{"value"=>"<p>This series is divided into three subseries: Outgoing letters, Incoming letters and Fan Mail. The division of Incoming letters and Fan Mail is based on Sarton's files. She kept certain letters organized by author (the series called Incoming Letters) and certain letters organized by alphabetical letter but grouped together (the series called Fan Mail).</p> <p>Material that did not come as part of the archives acquisition has an individual source note attached to its description indicating how the Berg Collection acquired it.</p> <p>ALS stands for \"autograph letter signed,\" TLS stands for \"typed letter signed\" and ANS stands for \"autograph note signed.\" In all three cases the S may be dropped if the item is not signed.</p>"}