Background
Foster was born August 21, 1875, in Warrensburg, Missouri, the son of James Foster and Agnes Eads, his father dying when he was just three years old.
Foster was born August 21, 1875, in Warrensburg, Missouri, the son of James Foster and Agnes Eads, his father dying when he was just three years old.
University of Southern California.
He went to public schools in Warrensburg, then to Missouri State Teachers College and Washington School of Dentistry in Saint Louis, Missouri. He took postgraduate work at the University of Southern California. In 1898 Foster volunteered for hospital service in the Spanish–American War and afterward helped in setting up the United States Dental Corps, being commissioned as one of the first dental surgeons in the United States. Army in 1902.
He served in that capacity until moving to Los Angeles the same year, where he practiced dentistry until he retired in 1924.
After leaving the in 1929 he worked in real estate. Foster was married first to Alice C. Stepper in 1897 in Springfield, Kentucky, by whom he had three children, Martha, Douglas Junior. and Jane.