The building, in yellow "fancy brick" with limestone trim over a brownstone basement, is indeed very fine, as we noted earlier. Note the gently rounded window bays, alternating with slightly angled bays, chimney stacks, and central stairway windows over the double-granite-columned entrance portico:
Note to the reader: With this 1903 Brooklyn Eagle article, we have exceeded the limit of the online Eagle at the Brooklyn Public Library, which runs only through 1902. The rest of the Eagle's run can be accessed at the wonderful "Fulton History" website. The articles do no load the way they do at the Brooklyn Public Library, so we cannot provide a hyperlink directly to the article as we have been doing with the BPL material. But the issues can be accessed via the search box at the Fulton History website. Many thanks to Fulton History for putting online material that the BPL has been unable to make available. The search key we used is highlighted in the article above ("Louis Bonnet", a typical misspelling of Bonert's name).
Note also that there is an error in the address cited in the article. The Bonert building at the corner of 4th Street is actually 343 6th Avenue, not 243 as cited above.