I've been wanting for some time to do this post, but my past attempts to visit the location in question never worked in my favor. But that ended up being a good thing! The Longswamp Township Historical Society invited their members and the general public to join them on a visit to the Upper Milford Historical Society to learn about the jasper quarries of the Lenni Lenape, and so off I went.
Our guides were John Fegley and Neil Moser of the UMHS, and as Neil put it, they "learn something new every week" in the organization. John in particular is an absolute fount of knowledge about the jasper quarries, which are so much the pride of the area that the community of Vera Cruz uses a jasper arrowhead as its emblem.