Here are the answers for GPS History Hunt 1, June 9-12:
Site 1, Noah Ferry's grave site: 43º 02.966' N 86º 14.269' W: The Ferry family section of the Lake Forest Cemetery; courtesy of cemetery supervisor.
Site 2, Johnson Boiler Co.: 43º 04.695' N 86º 12.861' W: 300 Pine Street, Ferrysburg; courtesy Johnson Boiler.
Site 3, Barber School: 43º 04.518' N 86º 11.582' W: Located in Spring Lake at 105 W. Exchange, the SW corner of Jackson and Exchange, courtesy of Village of Spring Lake.