Liberty Mutual was founded in 1912 and was a member of the National Association of Mutual Casualty Companies. In Liberty Mutual's 1932 Annual Report, it is stated that "a great number of claims are now being received for pulmonary diseases allegedly caused by the inhalation of silica and other dusts." Here is the excerpt from the 1932 Annual Report along with a 1935 letter from S. E. Whiting of Liberty Mutual to Dr. Leroy Gardner of the Saranac Laboratory in regard to autopsy material on asbestosis.