canal, discontinued ten years before, was laid under tribute, as the puddle of its old embankments near by, made up fifty years earlier, consisting of one-eighth clay mixed with sand and gravel, was used in this work.
The granite for the overfall had been quarried at Chelmsford, as had been the stone for the canal's aqueducts.
At this stage of the work labor troubles were evident, as one hundred and thirty men struck for twenty-five cents addition to the daily wage.
On June 2, 1863, Albert Whiting took charge of the masonry construction.
His experience on the dry docks at Norfolk and Charlestown, and at Fort Independence, qualified him for this important work.
On the tenth of June the northeast corner-stone of the dam was laid, but we find no record of any formal ceremony, other than the placing of a small vial containing the names of Charlestown's mayor, water commission, engineers and contractor in the lewis hole of the lower stone.
In sealing the vial, a new cent of that yea