The Wylie and Perkins Block at 284 to 286 High Street was built as a one floor building. The second floor was added later. The metal posts that bear load gives away that it was a one floor structure. Currently, it is the home of the Springfield Pharmacy.
Sanborn map analysis:
Sanborn 1884 map just shows that there is no structure
Sanborn 1889 map it is one floor and a variety store is here
Sanborn 1895 map it is one floor and an undertaker and tailor are here
Sanborn 1915 map shows it as a one floor building with a restaurant in front and a bakery in back
Sanborn 1949 map shows it as a two floor building with a store
Sanborn 1956 map shows it as a two floor building