At about 36 and 4/5 Miles as you follow the Pike is the West Branch of the Brandywine and a bridge over it.
About 1/5 mile East of the 37 Milestone is this stone embedded in the North side of the small bridge over the West branch of the Brandywine. The 1794 date matches the approximate date the turnpike was completed. The lettering on this stone may be the initials and titles of stone masons who worked on the bridge. According to a newspaper story dated October 8, 1874, the bridge at the time had a marble slab that gave the name of the mason and other builders. It also appears that the lettering on the bottom part of the stone has eroded away. The sketch of the stone shows all the lettering I was able to make out from the stone.
Link to Library of Congress image of stone marker. http://lcweb2.loc.gov/cgi-bin/displayPhoto.pl?path=/pnp/habshaer/pa/pa3900/pa3953/photos&topImages=200627pr.jpg&topLinks=200627pv.jpg,200627pu.tif&title=HAER%20PA-592-32&displayProfile=0
*Above banner image was taken at Chenoa Manor animal sanctuary near Avondale, PA. Link to learn more about Chenoa Manor and its mission
Milestone 37 - Keeps a very low profile
In 2009 this milestone is anchored into the base of a massive stone wall on the North side of Lancaster Avenue. The ArcelorMittal Company across the street lend an air of revitalization to an area that otherwise appears to be abandoned steel works. The second Midway House Inn was in this area, described as East of the 37 milestone. It's name comes from the fact that it was half way or midway between the Philadelphia and Columbia railroad terminals. The first Midway had been located on the turnpike, the second was geared toward Railroad traffic .
Link to more about Coatesville
The over view photo above shows the stone just to the left of the utility pole at the foot of the wall.
A Terrain map with the salmon colored stickpin showing the general location of Milestone 37