Ferguson was a proponent of the
Flat Earth and argued in favor of it using the Bible. He developed an idea of the world as square and stationary based on angels visiting the
four corners of the world. This Earth was an inverse
toroid. Ferguson lectured about the idea to an audience in the Morris Opera House in Hot Springs in 1891, and wrote a 60 page pamphlet based on that lecture. He believed that the sun was 30 miles in diameter and 3,000 miles away from Earth. He rejected the idea of
gravity and instead believed that the effects of gravity were the result of atmospheric pressure.
Square World, a magazine promoting the flat Earth, was published by Ferguson in 1896. A map depicting Ferguson's square and stationary Earth was printed in 1893 alongside a 92 page pamphlet. Don Homuth, a former member of the
South Dakota Senate, received the map from his 8th grade history teacher, who received it from his grandfather. Homuth donated the map to the
Library of Congress. Another copy of the map is held by the Pioneer Museum in Hot Springs. ==References==