According to <a rel="nofollow" class="external text" href="http://americanart.si.edu/collections/search/artwork/researchNotes/1980.93.pdf">the Smithsonian's research notes</a>, this painting depicts the mother Mary and son Campbell of the U.S. Congressman <a href="https://en.wikipedia.org/wiki/William_Smith_(Maryland)" class="extiw" title="en:William Smith (Maryland)">William Smith from Maryland</a> who served beginning in 1789.
<bdi><a href="https://en.wikipedia.org/wiki/en:Charles_Willson_Peale" class="extiw" title="w:en:Charles Willson Peale"><span title="American painter (1741–1827)">Charles Willson Peale</span></a>
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<a rel="nofollow" class="external text" href="//www.google.com/culturalinstitute/asset-viewer/8gFFOjRlh6Vl2A">8gFFOjRlh6Vl2A at Google Cultural Institute</a> maximum zoom level