They died of sickness.
Laura Ingalls - aviator - died in 1967.
Grace Ingalls, the sister of author Laura Ingalls Wilder, died on November 10, 1941.
Laura's sister Mary was born, lived and died as Mary Ingalls. She never married.
Laura was the last of the Ingalls girls to die.
Mary Ingalls Kendall was a fictionalized portrayal of Laura's real life sister Mary. In actuality, Mary Ingalls never married, likely due to her disability, and died in 1928.
This is not known. The Ingalls family dog Jack was given to the person who bought a team of horses from Charles Ingalls, as Jack was very devoted to the horses. The family had other dogs later on, all of whom were referred to in Laura's books as "Jack", though they actually had different names.
a heart attack
Yes, Laura Ingalls had two siblings who died in infancy - a brother named Frederick and a sister named Grace. Her other siblings experienced various challenges in their lives, such as illness, financial struggles, and personal hardships.
Laura Ingalls Wilder's mother, Caroline Ingalls, did not die of old age. She passed away in 1924 at the age of 64 from complications of diabetes.
Charles Ingalls died of heart disease at the age of 66
yes