American West Photographer Timothy O'Sullivan

Famous photographer Timothy O'Sullivan whose childhood and background are the subject of debate among photographic scholar was of Irish ancestry. It is known that as a teenager he worked in the studio of the legendary 19th century photographer Mathew Brady, who is seen as the father of photo-journalism. A veteran of the American Civil War in its first year, O'Sullivan turned his hand to photographing the horrors of war in during the final three years of the conflict before setting out on his cross-continental expeditions.

Timothy O'Sullivan, who used a box camera, worked with the Government teams as they explored the land. He had earlier covered the U.S. Civil War and was one of the most famous photographers of the 19th century.

He also took pictures of the Native American population for the first time as a team of artists, photographers, scientists and soldiers explored the land in the 1860s and 1870s.

The images of the landscape were remarkable - because the majority of people at the time would not have known they were there or have ever had a chance to see it for themselves.

O'Sullivan died from tuberculosis at the age of 42 in 1882 - just years after the project had finished .

He carted a dark room wagon around the Wild West on horseback so that he could develop his images. He spent seven years exploring the landscape and thousands of pictures have survived from his travels.

Timothy O'Sullivan's Pictures Show the Landscape As It Was Charted for the Very First Time

These remarkable 19th century sepia-tinted pictures show the American West as you have never seen it before - as it was charted for the first time.

The photos, by Timothy O'Sullivan, are the first ever taken of the rocky and barren landscape.

At the time federal government officials were travelling across Arizona, Nevada, Utah and the rest of the west as they sought to uncover the land's untapped natural resources.

19th century housing: Members of Clarence King's Fortieth Parallel Survey team explore the land near Oreana, Nevada, in 1867. Clarence King was a 25-year-old Yale graduate, who hired Irish tough guy O'Sullivan for his Geological Exploration of the Fortieth Parallel. Funded by the War Department, the plan was to survey the unexplored territory that lay between the California Sierras and the Rockies, with a view toward finding a good place to lay railroad tracks while also looking for mining possibilities and assessing the level of Indian hostility in the area.

Incredible: Tents can be seen (bottom, centre) at a point known as Camp Beauty close to canyon walls in Canyon de Chelly National Monument, Arizona. Photographed in 1873 and situated in northeastern Arizona, the area is one of the longest continuously inhabited landscapes in North American and holds preserved ruins of early indigenous people's such as The Anasazi and Navajo.

On this rock I build a church: Old Mission Church, Zuni Pueblo, New Mexico pictured in 1873 where the Zuni people of North have lived for millennia. O'Sullivan was famous for not trying to romanticise the native American plight or way of life in his photographs and instead of asking them to wear tribal dress was happy to photograph them wearing denim jeans.

Land rising from the water: The Pyramid and Domes, a line of dome-shaped tufa rocks in Pyramid Lake, Nevada photographed in 1867. Taken as part of Clarence King's Geological Exploration of the Fortieth Parallel, O'Sullivan's mesmerising pictures of the other-wordly rock formations at Pyramid Lake committed the sacred native American Indian site to camera for the first time