Authors retain rights their works in most cases.

McDaniel College makes no representation that it is the owner of any copyright or other literary property in the materials contained in its archives and special collections, (b) that in providing access to or permitting the reproduction of any such materials, McDaniel Archives does not assume any responsibility for obtaining or granting any permission to publish or use the same, and (c) that the responsibility (i) for determining the nature of any rights, and the ownership or interest therein, and for obtaining the appropriate permissions to publish or use and (ii) for determining the nature of any liabilities (including liabilities for defamation and invasion of privacy or publicity) that may arise from any publication or use, rest entirely with the researcher. 

See Published Works in a Collection:

http://libguides.hoover.mcdaniel.edu/content.php?pid=86700&sid=2698436