Favorite this☆ Business card for John B. Campau Description: View of a business card for John B. Campau. Printed on front: "John B. Campau, notary public, claim and real estate agent. Collections, etc., promptly attended to. Office, Room no. 3, Howard House Block, Griswold St., Detroit, Mich." Details Resource ID: bh013468 Subject: Real estate agents--Michigan--Detroit Notaries--Michigan--Detroit Business cards Date Issued: Unknown year Format: 1 business card ; 2 x 3.25 in. Member of: Burton Historical Collection Filing Location: E&M 977.4D4 381 C Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.