The Heyworth Building was constructed at 29 East Madison in 1903 (or so, depending on sources). And "despite the limitations of Burnham's stylistic vocabulary" (a direct quote from Burnham biographer Thomas Hines) this one seems to have turned out okay. Okay. This little Chicago School gem is one of my favorites in the Loop. Clearly expressed steel frame construction wrapped in terra cotta and brick. A bottom, a middle, and a top. Original ornament. And an intact cornice. Only a little modification at street level disturbs the effect.
Burnham's best Chicago School work happens AFTER the World's Fair of 1893. And that work was designed by East Coaster Charles Atwood and later by the man hired to be his assistant, Frederick Dinkelberg. (Dinkelberg occassionally gives Sullivan a run for the money when it comes to ornament.) (Both read Ruskin. See Dinkelberg's work at the Railway Exchange)
This block of Madison Street (and around the corner on Wabash) has become a surprising assemblage of good Architecture. Around the corner is the Silversmith (see previous post).