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 – Reminders of the M&N Main Line – Schwartzburg Junction to Hilbert Junction October 12, 2020 UPDATE – Reminders of the Appleton Branch June 15, 2020 UPDATE – About Us August 20, 2023