He was a co-founder of Graham, Anderson, Probst & White, the successor firm to Daniel Burnham's practice.

Graham designed the National Postal Museum in Washington, D.C., and the Equitable Building in New York City, among many others.

According to an obituary in The New York Times (November 23, 1936, page 21, column 1): "For nearly half a century, he was one of the great builders of Chicago."

He married his second wife, Ruby Fitzhugh (Powell) Leffingwell, in 1925 at Stokes Poges Church, England.

He died on November 22, 1936, at his home at 25 Banks Street, Chicago, Illinois, aged 68.