I agree with Peter’s take above. The internet is indeed an unfair advantage over previous historians and often you have to connect the dots incomplete sources. What the Rev. Tieck and Thomas Henry Edsall were able to do in their books without digital assistance in pretty remarkable.
Interesting to note that neither of the NY Times articles refer to “Indian Road” nor “Indian Pond,” which would seem to indicate that the names came after the Hiawatha performances and not before as the History in Asphalt explanation suggests.
I did not know about the Roosevelt visit to Fieldston either–at least not those Roosevelts. Eleanor Roosevelt visited the neighborhood later: