Statistics for occurrence #1 of “Rev. George W. Mansfield” in chapter 18, page 321 of Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register:

...iam H. Hatch. 1866-1868,Rev. Isaac J. P. Collyer. Died 7 May, 1872. 1869, 1870,Rev. Pliny Wood. Died 1873. 1871-1873,Rev. William P. Ray. 1874, 1875,Rev. Charles T. Johnson, W. U. 1863. 1876, Rev. George W. Mansfield , W. U. 1858. Third Congregational (Unitarian).—The Third Congregational Society was incorporated June 16, 1827, and in the course of the same year erected a substantial brick meeting-hous...
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