My block was 35th St. between Broadway Blvd. and Pennsylvania Ave. The block has changed over time. In 1909 the block had houses and the block was not fully developed. there were open lots where houses would go in the next couple years so I’m assuming during the time of the Sanborn map the area was being developed and built. Later on, in 1925, the block was fully developed with houses. Today, the block has no houses on it and is mostly parking lots for the life insurance building and the health science institute. The surrounding area has become more business than residential.