A long time trustee and Vice President of the Pennsylvania Abolition Society, she wrote a feature article titled "The Pennsylvania Abolition Society's Mission for Black Education" for the Historical Society of Pennsylvania's November 2005 newsletter.
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Williamson, the secretary of the Pennsylvania Abolition Society and a well-known public figure, was later convicted of contempt of court by Pennsylvania District Court judge John K. Kane and served a sentence between July 27 and November 3, 1855, in Moyamensing Prison.