"One quality consistent in the spaces of Sullivan's houses from the Charnley House to the Babson House is their insertion in an embracing rectangular prism through which the major and minor axes struggle.

"Beginning in 1909, Sullivan's interior spaces finally freed themselves from this restraining carapace, emerging in a series of cross-shaped plans in the two Bradley House projects and the Bennett House design. These compositions are no less processional, centering on a space just beyond the entrance point, enclosed in thickened poched walls, projecting dramatic axes forward and to each side, manifested externally as juxtaposed volumes.

"Sullivan's walls are thick, the windows deeply inset, and his masses can be marked with cantilevers like those over the porches of the erected Bradley HouseÑnot floating in the manner of Wright's Prairie Style but laboring with elaborate brackets to express the work of opening the interior space outward."

— David Van Zanten, Sullivan's City.