Despite being a slaveholder and defender of chattel slavery, Bayne served as a surgeon and brevet colonel in the Union Army during the Civil War.
[1] Bayne was owner of the Salubria plantation near Oxon Hill, Prince George's County, Maryland.
He was elected as a Whig to represent Prince George's in the House of Delegates' 1841 session.
[1] From December 1861 to 1864, he represented Prince George's in the state senate as a Unionist.
[4] Bayne was also a noted horticulturist, writing extensively about the cultivation of strawberries and tomatoes, among other fruits.