The collection consists of letters, greeting cards, survey maps, newspaper clippings, legal papers, photographs, collected recipes, land sales and expense journals, and survey reference books. The material was created or collected by pioneering Nevada surveyor, engineer, and real estate entrepreneur J. T. (John Thomas) McWilliams and his wife, Iona, between 1900 and 1968.
'From explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, by Capt. E.G. Beckwith, 3rd Artillery, E.G. Egloffstein, topographer for the route. 1855.' ''Selmar Siebert's Engraving & Printing Establishment, Washington, D.C.' Published by the War Dept. Scale 1:760,320. 12 miles to 1 in. Relief shown by hachures and spot heights.
'From explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War, by Capt. E.G. Beckwith, 3rd Artillery, E.G. Egloffstein, topographer for the route. 1855.' ''Selmar Siebert's Engraving & Printing Establishment, Washington, D.C.' Published by the War Dept. Scale 1:760,320. 12 miles to 1 in. Relief shown by hachures and spot heights.