Statistics for occurrence #1 of “Mrs. Mary Rowlandson” in chapter 20 of Medford Historical Society Papers, Volume 17.:

...ric Genealogical Society this season, and she acquitted herself so creditably that we feel honored by the work she has done. Her subject was The Massacre at Lancaster, the story of the captivity of Mrs. Mary Rowlandson . At each meeting of the Bay State Historical League one or more of our members have served as delegates. Eliza M. Gill, Secretary.
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