Caukin, Henry M.A survey map detailing an island in Mud Lake, located in Section 19 of Sidney Township in Montcalm County, Michigan. The island was surveyed in August 1889.JPEG200082442fcd-f20c-4677-923f-46dd32963949MI-T010N-R007WengDepartment of Natural Resources8888-003Public10N 07W - Survey Map of Sidney Township, Montcalm County, Page 2 [Michigan]MapsMichigan--MontcalmT010N-R007W1889