It probably is. Heck, this receipt (as they say in South Carolina) could be in the "Joy of Cooking" for all I know. But I do get a kick out of the sentence structure he used in describing the preparation process.
I don't know how old you are, but my grandfather was probably in your great-grandfather's generation. My grandfather was a doctor in Washington, DC, and, I assume, a contemporary of Dr. Tyler. That is how we came by the recipe.
FReegards,