Gary,
I enjoyed reading your essay, and felt grateful that you made me think about "the topic" in the context of the history of science. Obviously, this approach ought to inspire at least some of the answers.
Your method of involving the human element (including the fact that things would have progressed differently had certain individuals known about the work of others - perhaps even more so if not coeval) supports the narrative that the connection between physics and math should not be viewed in isolation from the people actually "doing" the two disciplines. I was not sure if one should interpret this observation to mean that you view mathematics as something that people "develop," rather than something that would have been always out there (somewhere, somehow) even if no human ever existed. Taken to its extreme, this interpretation could imply that the connection between physics and math "resides" in the nature of humanity. It appeared safer not to draw such a conclusion without your blessing.
In any case, your essay is good work, and deserves a good rating.
I also wish you Good Luck.
En
P.S. I replied to your comment on "my page."