Supplying the hungry army at Harrison's Landing.

A sample of the Chickahominy Swamp.

Rear Admiral Porter's Flotilla arriving below Vicksburg.

The BLACKHAWK, Admiral Porter's flagship during the Vicksburg campaign.

Hazen's men landing from pontoon boats at Brown's Ferry during the Battle of Chattanooga

Bombardment of Fort Sumter and adjacent forts by the Union Fleet in Charleston Harbor.

The "Swamp Angel" in position and ready to fire on Charleston.

The bombardment of Fort Fisher. The fall of this fort led to the fall of Wilmington, the last major Confederate port open to blockade runners.

The Lexington passing over the falls at the dam. This was during David Dixon Porter's Red River campaign following the fall of Vicksburg. The sketch was made by James Madison Alden, formerly attached to the Coast Survey steamer ACTIVE on the Pacific coast.

The Confederate Fort De Russy from a sketch made by Clarence Fendall of the Coast Survey.

Level

Level crew breaking for lunch in eastern Washington.

Leveling operations. Umbrella used to shade instrument from sun which causes derangement from level of the instrument.

Leveling operations making an observation across water.

Level crew wading through swamp after cutting path through brush. Tough work!

Level crew slogging through a swamp.

Level crew operating in brush area requiring extensive cutting of vegetation.

U.S. Army tent camp at Manila following the end of World War II.

Departure of Lieutenant Colonel Glenn Moore from Philippine Coast and Geodetic Survey in 1947. Colonel Moore in center, Palma, DeJesus, and Andres Hizon, future head of the Philippine Coast and Geodetic Survey from left to right, then Moore, Paulson, and unknowns.

Michelle Apartments at Manila, home of Marvin and Muriel Paulson following World War II.

Homes next door to the Michelle Apartments each having 10-15 occupants.

Looking north from the Michelle Apartments at some of the wartime devastation.

Remains of the U.S. Coast and Geodetic Survey Building where Commander Cowie was killed during a bombing raid at the beginning of the Second World War.

Triangulation observing party ready to pack in to a station.

Leveling observing party

Base line measuring party.

Hotel Chewaucan at Paisley, Oregon.

Office trailers in the city park at Colfax, Washington.

Survey crew member trailers at Colfax, Washington.

Main street of Kotzebue, Alaska in 1950.

Shishmaref Schoolhouse and living house. Tents are living quarters for triangulation crew.

Base camp at Kotzebue, Alaska, before the field work began.

Stinson Gullwing with broken landing gear following hitting a pothole when landing on the beach.

Another view of the Gullwing.

Harbor office at the port of Santa Monica.

Hoover Dam on the Colorado River near Las Vegas, Nevada.

Stinson Gullwing on floats at Kotzebue.

Kotzebue oceanfront property with seal meat drying on racks.

Upper right windows were location of Paulson apartment in Kotzebue.

Caterpillar caravan heading to a new camp over the frozen Bering Sea in March.

Framing the quanset hut - party living quarters - in -30 Fahrenheit temperatures .

A little bit of snow drift. Wonder how they got out in the first place.

Main street on an Arctic Field Party Camp somewhere.

Marvin Paulson on the left and Francis Popper on the right.

Just another day with near white-out conditions. This wasn't pleasant at 30 below zero.

Just another day with near white-out conditions. This wasn't pleasant at 30 below zero.

Marvin Paulson's traveling home with two Eskimos doing triangulation reconnaissance work.

Recording angles for a triangulation observer at 10 below zero.

After the ice receded, these boats were used for hydrography in the Beaufort Sea .

Checking tide gauge.