The white part where we lived had a porch around the front with the main entrance being on the east side next to the small yard area. There was a separate entrance to an office closest to the brick part of the building where HH had his law practice. CJU owned the apartment building during part of this time.
As for the feed mills, here is a rough map of where they were located. [The map has been removed as it turned out to be easily altered and was being used as an advertisement for a Hillsboro business.]
A: Originally Boden Flour Mill, later New Vienna Milling Co. - now demolished
B: Farm Bureau (branch of Wilmington Farm Bureau)
C: Unknown name, was probably located further west but on south side of RR tracks, behind Smith Funeral
D: New Vienna Grain, run by Benson West and his son-in-law Glenn Southerland - demolished
E: Near where cannery was, now near plastic factory, run by Mac Laughlin, possibly from Lynchburg
Corrections and additional information on mills in New Vienna still being collected. Thanks for any help you can provide!