Index to the Probate Records of the County of Worcester, Massachusetts, from July 12, 1731, to [January 1, 1920] Series A-B: v. 1 From July 1, 1881, to July 1, 1897 (with supplement to Jan. 1, 1898) prepared under the supervision of George H. Harlow. v. 2 From July 1, 1897, to January 1, 1910, prepared under the supervision of John W. Mawbey. v. 3 From January 1, 1910, to January 1, 1920, prepared under the supervision of Harry H. Atwood