Complex sentence: Eliot also chaired an editorial committee and edited several volumes for the Centennial Edition of the works of Theodore Parker and completed a "A History of Cambridge, Massachusetts, 1630-1913" in 1913.
Split into simpler sentences: Eliot also chaired an editorial committee and edited several volumes for the Centennial Edition of the works of Theodore Parker. He completed a "A History of Cambridge, Massachusetts, 1630-1913" in 1913.