"Anthropophagi are not native to the Americans. Northern and Western Africa, the Caroli Islands, but not here... they are not natural scavengers... Anthropophagi prefer fresh flesh, but there are drives even more powerful then hunger... the female can breed, but she cannot bear. She lacks a womb. you see, for that location of her anatomy is given to another more vital organ; her brain."
The "Incident" is when Dr. Warthrop and Will Henry are brought a body from Mr. Grey, a old grave robber that had found the body of a young girl, with a Anthropophagus attached to the corpse. Knowing they are not native to the Americas; Pellinore and Will seek out to start the hunt with, towns folk, and local police.
After a fight, the battalion of Citizens and Police kill the pack of Anthropophagi, they follow the Alpha Female; which was fleeing, and take it's life.
Motley Hill Sanatorium, Will and the Doctor went to seek a man, Dr. Starr. He had helped Pellinore's father, and helped Pellinore. Leading him to a ship captain, Captain Varner; he told them the story of a trip to Africa. Obtaining three Anthropophagi, a cub, a Alpha Female, and an Alpha Male. They were bringing them back, but due to a storm- they climbed out the left porthole. Killing the crew but not the Captain. He managed to escape, causing the infestation.