On the way to Gallatin Peak - high peak to left. Where do we go from here? Triangulation party of William M. Scaife

No more horse packing. Observing party on the side of Gallatin packing up

Observing party leaving Pony, Montana, for Station Jefferson. Heading for peak to left in picture

Observing party near Station Salesville. Triangulation party of William M. Scaife

En route to Black Butte. Triangulation party of William M. Scaife

Food cache - packing in to the interior of Alaska. Triangulation party of William M. Scaife

Fording a stream. Triangulation party of William M. Scaife

Fording a stream. Triangulation party of William M. Scaife

One of 25 crossings of Clear Creek on the way to the railroad. Triangulation party of William M. Scaife

Fording a stream. Triangulation party of William M. Scaife

The easy way - a suspension bridge. Triangulation party of William M. Scaife

A new shoe. Triangulation party of William M. Scaife

Cinching it up. Triangulation party of William M. Scaife

The trip to the railroad from Station Clear. Triangulation party of William M. Scaife

A good roll - the end of a perfect day. Triangulation party of William M. Scaife

White 1 and 1/2 ton truck. Astro Party of C. V. Hodges

"A dusty road" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Where power is needed" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Will it?" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Trucks, en route" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Ferry, Snake River" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Dust ruts" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Trail through plowed field" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Cleaning carbon" - White 3/4 ton truck. Astro Party of C. V. Hodges

"Overhauling tires" - White 3/4 ton truck. Astro Party of C. V. Hodges

"A sure sign of Sunday" - White 3/4 ton truck. Astro Party of C. V. Hodges

On the Columbia Highway at Mitchell Point, Oregon - White 3/4 ton truck. Astro Party of C. V. Hodges

Approaching a station in an Oregon wheat field - White 3/4 ton truck. Astro Party of C. V. Hodges

On the Columbia Highway, Oregon - White 3/4 ton truck. Astro Party of C. V. Hodges

On the road. Triangulation party of E. W. Eickelberg

"A precarious position" - using trucks on a primary triangulation party. Triangulation party of E. W. Eickelberg

'O' party following a creek bed in preference to a muddy road. Triangulation party of E. W. Eickelberg

"A tight squeeze" - using trucks on a primary triangulation party. Triangulation party of E. W. Eickelberg

"Near Westfall, Oregon" - using trucks on a primary triangulation party. Triangulation party of E. W. Eickelberg

Yucca trees near Victorville, California. Graham Brothers 1 and 1/2 ton truck. Level party of F. W. Hough

Moving day in the Mojave Desert. Level party of F. W. Hough

Stuck in the sand. Traverse and triangulation party of L. P. Raynor

Here and there in Idaho and Montana. Triangulation party of William M. Scaife

Truck no. 19 - Here and there in Idaho and Montana. William M. Scaife and wife on July 2, 1922. Triangulation party of William M. Scaife

Here and there in Idaho and Montana. Triangulation party of William M. Scaife

Two trucks pulling a third from a mudhole. Here and there in Idaho and Montana. Triangulation party of William M. Scaife

Here and there in Idaho and Montana. Triangulation party of William M. Scaife

Where horse power and horsepower converge. Triangulation party of E. O. Heaton

After the rain. About 40 miles north of Valdez. Level party of H. P. Odessey

A bad stream to ford. Level party of H.P. Odessey

"The worst unbridged stream". Level party of H. P. Odessey

North entrance to Keystone Canyon. Levels from Valdez to Fairbanks. Level party of H. P. Odessey

Digging out of the sand - time for a photo.

"Odessey's Party, Kimball Base 1924". Triangulation party of H. P. Odessey

On floor of Death Valley. Reconnaissance party of William Musseter