Quay, in May, 1904, when he was appointed by Governor Pennypacker to succeed that well-known senator from Pennsylvania, for the session ending March 4, 1905. He resigned from the cabinet June 30, 1904 and took his seat in the senate on the sixth of the following December. In the session of the Pennsylvania legislature for January, 1905, he was elected to the senate to fill out the unexpired term. His present term of service will expire March 4, 1911.
Senator Knox is fond of outdoor sports and is a lover of fine horses. He has a beautiful country seat at Valley Forge, Pennsylvania, where he can indulge freely in these tastes, which are shown also by his membership in the Pittsburg country club, in the Chevy Chase Golf club of Washington, and in the Castalia Fishing club. He is also a member of the Duquesne and Pittsburg clubs, and the Union League of New York. He was president of the Pennsylvania Bar Association in 1897.
He was married in 1876 to Lillie, daughter of Andrew D. Smith, of Pittsburg.