Scope and Content: In 1863 the Commissioners on Public Lands assumed full responsibility for the maintenance and care of the Mill Dam (now Beacon Street) and the roads and bridges connecting to it.  These roads constituted more than nine miles of roads in  Boston, Brookline, Watertown, and Brighton stretching over the Back Bay area that was filled in over the course of the 19th century.  At this time the commissioners also assumed the right to collect tolls that were put into a Mill Dam account and used to fund repairs and improvements and to build up a reserve of funds to be distributed to the municipalities in which the roads were situated when responsibility for the roads was transferred to them.  The commissioners kept these records of Mill Dam account revenues and expenditures.
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