ous question remaining was whether, since a county is an integer or part of a State, the United States can impose upon it, as such, any obligations to keep the peace in obedience to United States laws. [FN27] This he answered affirmatively, citing Board of Comm'rs v. Aspinwall, 24 How. 376, 16 L.Ed. 735 (1861), the first of many cases [FN28] upholding the power of federal courts to enforce the C