Complex sentence: Thomas is first of record in Watertown, Mass., when on 25 July 1636 he was granted 30 acres of land by the town and he became a freeman in Watertown on 13 May 1640.
Split into simpler sentences: Thomas is first of record in Watertown, Mass., when on 25 July 1636 he was granted 30 acres of land by the town of Watertown. Thomas became a freeman in Watertown on 13 May 1640.