Transcriptions of Births, Deaths, and Marriages to the year 1850:

Cambridge Births:

Vital records of Cambridge, Massachusetts, to the year 1850 : Cambridge (Mass.) : Free Download, Borrow, and Streaming : Internet Archive

Cambridge Marriages & Deaths:

Vital records of Cambridge, Massachusetts, to the year 1850 : Cambridge (Mass.) : Free Download, Borrow, and Streaming : Internet Archive

Most other Massachusetts towns also have transcribed versions of births, deaths, and marriages.

Originals of Births, Deaths, and Marriages:

We primarily accessed original records through ancestry.com and americanancesters.org. Both sites require you to have an account, but some libraries and other institutions offer access to these resources.