A.G. Long Building, 1910
I can find absolutely no references to a "Dougherty Shoe Manufacturing Co." anywhere, anytime, ever. Complete mystery. The sign is pretty faded at the top of the A.G. Long building at NW 16th and Northrup.
Another sign once graced the top third of that side of the building but it is long gone now. I suspect it said something like "A.G. Long - Fire Apparatus." Mr Long operated a fire supply business from that building. He once ran his business from a building at NW 5th and Couch which still bears the "A.G. Long - Fire Apparatus" sign (more on this later).
Mr. Long's business was one of the most recognizable names in fire fighting apparatus (engines, hook and ladder trucks, hose carts, hand fire extinguishers, etc.) in the Northwest. A.G. Long hydrants can still be seen in Portland, Astoria, and other cities in the region.