natural cause

Reason told him that there must be a natural cause for what he had seen.

He was alone and no natural cause could kill him.

The family said he was found dead in bed of natural causes.

He was 95 years old and died of natural causes, his family said.

He died on May 5, 2005 of natural causes at age 67.

He was 62 years old and died of natural causes.

He died 16 months later in May 1891 of natural causes.

According to police, he had been dead for several days and died of natural causes.

He died from natural causes at the age of 78.

He died of natural causes at his home on 11 May 2011.