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Medford Historical Society Papers, Volume 7., An eighteenth century enterprise. (search)
vey by an expert survey, Samuel Weston. He found that the Merrimack River at Chelmsford was lower than the highest point the canal would traverse, instead of higher,he Concord at Billerica, and a descent of twenty-six feet to the Merrimack at Chelmsford. Five others provided entrance into these rivers, and also into the Mystic a. Nor were these all. With the exception of the guard locks at Billerica and Chelmsford, which, of hammered granite, were equalled by nothing then in our country, thnted by Judge S. P. Hadley of Lowell (whose father was for years the agent at Chelmsford), and who was himself an employee of the canal. It has been said that the genters' ink; for having made the successful passage to Concord and returned to Chelmsford, he immediately wrote an account of his doings to the Boston Advertiser, whic the canal was being constructed, a canal was built around Pawtucket Falls at Chelmsford, and for twenty-five years was used for the purpose of navigation. Then some