How did alphonse die in Frankenstein?

In Mary Shelley's "Frankenstein," Alphonse Frankenstein, Victor's father, dies from grief and despair. After the tragic events surrounding William's death and Justine's execution, Alphonse becomes increasingly distraught over the loss of his family. His health deteriorates, and he ultimately succumbs to his anguish when he learns of Victor's own troubles and the monster's influence on their lives.