Rockingham County, N.H.

1892

D.H. Hurd & Co.

1:158k

(General geological map of New Hampshire. Sheet 6)

1878

New Hampshire. Geological Survey

1:155k

Rockingham (County), (New Hampshire).

1877

Hitchcock, C.H.

(Topographic and glacial feature map of New Hampshire. Sheet 5)

1878

New Hampshire. Geological Survey

1:155k

Newburyport quadrangle, Massachusetts

1894

Geological Survey (U.S.)

1:63k

Haverhill quadrangle, Massachusetts

1893

Geological Survey (U.S.)

1:63k

Massachusetts. Atlas Plate No. 1.

1891

Walker, O.W.

1:63k

Newburyport

1932

1:48k

Haverhill

1935

1:63k

Exeter

1934

1:63k