Favorite this☆ Lewis Cass proclamation for the establishment of St. Clair County, Michigan Description: Lewis Cass proclamation for the organization of St. Clair County, Michigan and for the establishment of its seat of justice at St. Clair, Michigan. Details Resource ID: bh024672 Creator: Cass, Lewis, 1782-1866 Subject: Cass, Lewis, 1782-1866 Saint Clair County (Mich.)--History Michigan Territory--History Proclamations--Michigan--Saint Clair County Date Issued: 1820-03-28 Format: 4 unnumbered pages ; 10 x 8.25 in. Member of: Burton Historical Collection Filing Location: MS/Cass, Lewis, Box 6 Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.