UPDATE – M&N Main Line – Schwartzburg to Hilbert New information and photographs of Cedarburg, Wis., have been added to The Milwaukee & Northern Main Line from Schwartzburg Junction to Hilbert Junction page. The former M&N main line at Cedarburg, Wis., on 11 February 2021. Photograph by Tom Bruss.The former M&N main line at Cedarburg, Wis., on 11 February 2021. Photograph by Tom Bruss. You Might Also Like UPDATE – M&N Main Line – Schwartzburg to Hilbert March 14, 2021 UPDATE – Main Line – Menominee River to Ontonagon July 17, 2022 UPDATE – Reminders of the Champion Branch May 22, 2025