The image below is a scan of a photocopy of a photograph of a row of Bates Street NW homes. The notation says it is the 100 block of Bates but that set of three 2nd floor bay windows in a row between two bay-less houses looks like 204 to 208 Bates Street NW. But I’m not 100% sure.
If I have the right block, it appears the original stairs were done away with.