I am neither uninformed nor incorrect. The Pattern 1914 was a follow on of the Pattern 13 designed at Enfield modified to fire the standard British .303 round by Enfield. The Pattern 1914 design was modified by Springfield Armory to fire the 30-06 round so while the basic design was a product of Enfield the Model 1917 technically is not. The official designation is actually United States Rifle, Calibre .30, Model of 1917. Of course as pointed out we are quibbling about mere semantics in reality. Good news about the book as I love collecting books almost as much as rifles.