▁ 4 , 0 0 0 ▁patients ▁under ▁charge ▁of ▁I . ▁I . ▁Hay es ▁of ▁Ar ctic ▁expl oration ▁fame . ▁With ▁the ▁class ▁of ▁ 1 8 6 2 - 6 3 ▁he ▁was ▁graduated ▁from ▁the ▁medical ▁department ▁of ▁the ▁University ▁of ▁Pennsylvania , ▁and ▁went ▁immediately ▁to ▁the ▁front ▁as ▁assistant ▁sur geon ▁of ▁the ▁ 8 th ▁Pennsylvania ▁Caval ry . ▁He ▁was ▁present ▁at ▁thirty ▁batt les ▁during ▁the ▁war , ▁and ▁in ▁all ▁dis charg ed ▁the ▁duties ▁of ▁a ▁full ▁sur geon . ▁On ▁February ▁ 4 , ▁ 1 8 6 5 , ▁he ▁received ▁his ▁promotion ▁to ▁full ▁sur geon ▁with ▁the ▁rank ▁of ▁major , ▁and ▁on ▁the ▁cons olid ation ▁of ▁his ▁regiment ▁with ▁the ▁ 1 6 th ▁Pennsylvania ▁Caval ry , ▁was ▁must ered ▁sur geon ▁of ▁the ▁joint ▁body ▁thus ▁organized , ▁and ▁appointed ▁sur geon ▁of ▁the ▁military ▁district ▁of ▁Lyn ch burg , ▁Virginia , ▁which ▁position ▁he ▁held ▁until ▁must ered ▁out ▁of ▁service ▁on ▁August ▁ 1 1 , ▁ 1 8 6 5 . ▁On ▁his ▁return ▁from ▁an ▁extended ▁tour ▁through ▁Europe ▁in ▁ 1 8 6 7 , ▁he ▁settled ▁at ▁Sc r anton , ▁Pennsylvania , ▁where ▁he ▁successfully ▁pract iced ▁his ▁profession , ▁He ▁served ▁as ▁a ▁member ▁of ▁the ▁medical ▁staff ▁of ▁the ▁L ack aw anna ▁state ▁hospital , ▁a ▁member ▁of ▁the ▁Sc r anton ▁Board ▁of ▁Health , ▁and ▁sur geon ▁of ▁the ▁