Manuscript map.
Cadastral map.
Oriented with north toward the upper left.
Transcription of text: "Boston 13th Nov. 1846. I think that the lots & flats No 1 - and a part of, or the whole of No 2 is of service to the United States Government for proving and experimenting with cannon and other ordinance. Cyrus Alger." "I approve the above [re]commendation. Boston Janr. 13 1847, G. [?]ford."