sentences:  After undergoing surgery, he unexpectedly died on December 6, 1928, in Battle Creek, Michigan, missing, only the day before his death, the opening of the "Hall of Fishes", his crowning work at the American Museum of Natural History.Following his death, his friends and family completed construction of the armor hall at his home and installed his private collection there.The Metropolitan Museum later became home to about half of his armor collection of 800 items through an outright bequest and through purchases made possible by gifts by friends and trustees of the museum, which his friend Daniel Chester French commemorated with a plaque.