Photograph of Edward MacDowell: this was published in <cite style="font-style:normal">Hagedorn, Hermann (<span class="mw-formatted-date" title="1921-12-28">December 28, 1921</span>). "<a rel="nofollow" class="external text" href="https://books.google.com/books?id=sVroBrOJL64C&amp;pg=PA688">The Peterborough Colony</a>". <i>The Outlook</i> <b>129</b> (17): 688. New York, United States: The Outlook Company. Retrieved on <span class="mw-formatted-date" title="2011-10-18">October 18, 2011</span>.</cite>
Unknown author<span style="display: none;">Unknown author</span>
1921
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