He was born in San Francisco and educated in Copenhagen, at the Royal Academy in Dresden and later in Paris with M.A.F.
Other noteworthy portraits and miniatures are in the permanent collections of the Musee Nationale de Buenos Aires; a miniature of King George of Greece in the collection of Queen Alexandria; The Archbishop of Buenos Aires in the Cathedral of Buenos Aires; the wife of Marechal da Fonseca, President of Brazil, Salon des Artistes Francais 1914, etc.
Brock is Officer d'Academie de France and Lieutenant in the Royal Danish Army.
[1] During his professional career, Brock hand-colored scenes from a number of motion pictures, including Erich von Stroheim's Foolish Wives (1922), The Death Kiss (1932) with Bela Lugosi, and the independently made feature film Adventure Girl (1934).
He first married Else Cecilie Emilie Nielsen (1985 -1930) in 1903 and had a son, Gustav Lave Brock in 1904.