Mouth and bar of Pearl River, Sandwich Ids., sections of proposed channel

"Showing the quantity of excavation that will be required to make a channel for navigation through the bar that shall be 600 ft. wide and 26 ft. deep at low-water."
"Note: These sections are taken on the red lines on sheet no. 1."
In upper left corner: Sheet no. 2.
Annotated in red ink in lower left corner: Copy--made in Office of Chief of Engineers, Oct'r 23rd 1873.
Available also through the Library of Congress Web site as a raster image.