Brooke was appointed a captain in the Wilford Volunteer Rifles in January 1860,[7] before resigning his commissions in December of the same year.[8] He was appointed High Sheriff of Suffolk in February 1869, replacing Frederick William Schreiber.[9] He was married twice during his life, firstly to Juliana in 1839, with the marriage lasting until her death in 1840. His second marriage was to Louisa in 1852, with whom he had issue.[10] Brooke died suddenly at Ufford in January 1886.[11][12]