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Blake, George S.
Title: North Shore [of] Long Island Sound from Black Rock Lt. to Sheffield Lt., Conn.
Publisher: United States. Coast Survey. Washington .
1 map; 136 x 223 cm., on 4 sheets 74 x 116 cm., Sheet 1/4
Notes: Relief shown by hacures and landform drawings. Bathymetry shown by soundings and isolines. Standard map series designator: Register no. H-18. Photocopy of an original manuscript. Shows quadrant correction. "No. miles run while sounding 394.2 area sounded. Sq. mile 80.0. L.B.L. April 16,1859". "Add 0.6 foot to the soundings to reduce to approximate M.L.W. [mean low water].