Pages 539 and 540 of “History of the City of Columbus, capital of Ohio, Volume 2″ goes into great detail about the quality of Hallwood Block and Hayden Block as well as the benefits laying down brick pavement was providing for Columbus, making it a model for the nation and improving property values. It seems the extra 20 to 30 cents per square foot for these blocks was well worth it as other bricks wore too quickly.  It appears that the blocking and bricking starts in the city in the mid 1880’s.  You can read more via Google Books.