Source: Annual Report of the Board of Police Commissioners of the City of St. Louis, 1870-1892 (incomplete run). In The Mayor's Message: With Accompanying Documents, to the City Council of the City of St. Louis. Location: St.L / 352 / Sa2m
Last Name:	Brock
First Name:	John
Middle Name:	W.
Age:	35
Remarks:	in list of changes in the force during the year
Report:	13th Annual Report Year Ending March 31, 1874, In "The Mayor's Message," May Session 1874
Page:	17