And by “research” I mean little more than clicking my mouse on other web sources out there and being arbitrarily selective as to their veracity.
That's interesting. The first thought would be that the monument marks the spot where he gave the speech. But, on second thought, maybe not ...
Your coordinates are quite precise. A hundredth of a second of longitude at that latitude is about nine inches. Mr Lincoln wore size 13 shoes.
How did you discover the exact location?