Most legible to me is "Jones Purchasing Agency" at the top of the sign. The Downtown Journal, having beaten me to the ghost hunting punch by more than a few years, mentions this particular sign but doesn't give any history. Sadly, I've not got too much else either, but the intervening years mean I get to take advantage of Google Books. And the company whose stated mission is to organize all the world's information has something for me. It seems that city records show that the agency proposed to provide a cement mixer to the city in Feb., 1911. So I guess they sold stuff. Who knew?
As long as I can remember, this has been a store selling sports souvenirs. I've never been in, but I'd always wondered how much business they actually get. Do people really cross the street from the dome to pick up a t-shirt? I guess I'm just not the type who buys a lots of commemorative crap...er.. I mean gear.
Explanation of the title here.