Source: Aurora (1946) Ad:

BIG FOUR ELEVATOR
Successor to Clay Syler
GRAIN - FEED - COAL - SEED
FERTILIZER - TILE & GRINDING
PHONE 160   NORTH MANCHESTER, IND.

Source: Aurora (1950) Ad:

BIG FOUR ELEVATOR
Grain - Feed - Coal - Seeds, Etc.
NORTH MANCHESTER, INDIANA
Telephone 160