Rare blue back chart of Martha's Vineyard and Nantucket Sound, published by the Blunt firm in 1857.
The larger chart extends from Holmes Hole, Nobska Pt., and Falmouth Village in the west to Nantucket and the Shoals to the east, and Chatham.
The second chart is an excellent highly detailed chart of Boston Harbor.
This is the first edition of this scarce pair of charts.
This is the second example of the map we have seen in over 20 years.