Brooklyn Daily Eagle, April 11, 1899, p. 14 ("New Buildings")
Note the Brooklyn Eagle's description of these articles as "tenements". These buildings are 30' wide, or 15' per apartment. Bonert's early "Green Man" apartments, by contrast, were usually 19-20' wide, and his newer limestone-faced apartments in 6th Avenue were a spacious 23.5' wide. And those earlier buildings held only a single apartment per floor. Thus the 15'-wide apartments necessitated by an 8-family configuration on a 30' lot might seem rather narrow by comparison.
The Brooklyn Eagle once again mangles Bonert's name, citing him as "Bonnert" or "Donnert". Any suspicion that these apartments might have been built by someone else is resolved by an article about a year later, which recounts how Louis Bonert trades two of the finished buildings to a "syndicate of capitalists" for a block-front of lots in Bedford Avenue, on the other side of Prospect Park:
We now recognize the President Street buildings as classic Park Slope 8-family apartment houses. Certain stylistic details echo some of Bonert's earlier buildings: three stories of brick, trimmed with stone, over a limestone-faced first story, over a brownstone basement, with full-height, rounded window bays:
The buildings exhibit graceful notes perhaps not often associated with "tenements", including small stained-glass windows (not all of which survive). Note also the use of narrow, elongated "Roman" brick:
Bonert's signature florid capitals and pediment embellish the doorway and windows:
Look closely to see winged figures peering out from some of the buildings.
Is Bonert revealed here as an angelologist?
Below, from Google's "street view", the buildings in Bedford Avenue, across Prospect Park, most likely another Bonert row of 8-family flats.