They brought design ideas of Prairie Style, influenced by Frank Lloyd Wright, and Art Deco architecture to the firm.
A total of 143 properties in thirty Arkansas counties were nominated for NRHP listing in the 1982 study, "Charles L. Thompson Design Collection Thematic Resources", written by multiple authors.
F. Hampton Roy, a Little Rock ophthalmologist, began cataloging the architectural drawings, expecting to complete a book.
The properties listed under this study were selected from review of a large collection of original drawings by Charles L. Thompson, Fred J. H. Rickon, Thomas Harding Jr., Theo Sanders, and Frank Ginocchio.
The collection of drawings covered 2500 properties representing a wide range of types and styles geographically distributed over the entire state of Arkansas.