In 1890, the Lighthouse Board requested $5,500 for a steam fog signal for South Fox Island as shoals in the middle of the passage between the lighthouse and North Manitou Island forced mariners to sail near the station. The funds were finally provided on March 2, 1895, and a ten-inch steam whistle was placed in operation on December 10 of that year. The fog signal plant consisted of duplicate boilers with Crosby automatic signals housed in a frame building, measuring twenty-two by forty feet and covered on the outside by corrugated iron. The walls between the studs were filled with a sawdust and lime filling, and the fog signal equipment rested on a concrete floor. A brick oil house, with an iron door and roof was also added to the station at the same time to store the volatile kerosene that replaced the lard oil formerly used in the light.
Water for the fog signal was extracted from the lake using a water supply crib until 1898, when a well was dug and curbed, and a pump house was built over it. To provide housing for the additional two keepers needed to help run the fog signal, a five-room frame dwelling was built in 1898. A larger red brick dwelling was built for the keepers in 1910. A typical year for the fog signal was 1900, when it was in operation for 277 hours and consumed about five tons of coal and forty-one cords of wood. As it took about an hour to build up the necessary ninety pounds of pressure to sound the whistle, the keepers had to be good at predicting the weather.
Although it was not their primary responsibility, the keepers at South Fox Island kept an eye on the surrounding waters and were quick to render assistance to those in need. Several rescues made by Keeper James McCormick and his assistants were noted in Lighthouse Service records. In 1916, Keeper McCormick and an assistant pulled a disabled boat with three men aboard off the island and towed it to a fishing tug. Three years later, three of the station’s keepers towed a disabled boat to the station and repaired its propeller, but the big year for Keeper McCormick and his assistants was 1921. During that year, they towed a fishing tug to Northport, hauled the wrecked fishing tug Emma S. Olson to shore and helped remove its engine, and prevented the launch Aida from going ashore in a storm.
In 1922, the lighthouse tender Hyacinth was tasked with delivering motor boat No. 63 to South Fox Island. On October 24, the tender’s launch, under the command of First Officer George K. Brown, was towing the motor boat to shore, when the launch wrecked in the breakers, resulting in the drowning of the first officer. Keeper McCormick and his assistants made a heroic effort to reach the wreckage and save the rest of the crew.
To improve the visibility of South Fox Island Lighthouse, its illuminant was changed from oil vapor to electricity in 1929. That same year, the fog signal building was rebuilt and a Tyfon fog signal, with duplicate air compressors and a gasoline-engine-driven electric generator, was installed therein.
The fog signal on South Fox Island was discontinued in 1954, and in 1958, Allen P. Cain, the light’s last keeper, left the island after the light had been fully automated. The automatic light functioned for a decade before being discontinued in 1968.
In 2002, the station logbook that covered the last five years of its operation was in the possession of Hugh Bilyea, whose wife got it from Allen Cain, her uncle, after he retired. “It’s the most boring thing you’ll ever read,” Hugh said. “The wind was always blowing. And all they did was paint.” The following entry, one of the longer ones, described March 27, 1953, opening day of the season: “Arrived at Station by Charlevoix Picket Boat at 12 noon, put lights and water in operation. NW wind.” A few terse entries, such as “Beautiful sea” and “Northern lights,” do seem to indicate that Keeper Cain enjoyed the surroundings.
The southernmost 115 acres of the island were transferred to the Michigan Department of Natural Resources (DNR) in 1971 for public parks and recreation use. The first effort to preserve the abandoned property occurred during the summer of 1984, when Bradley Boese took a youth group to the island under the direction of the Traverse Bay Area Intermediate School District and the DNR. In 2002, Bradley Boese and Cathy Allchin formed the Fox Island Education Association (FIEA) with the goal of preserving the light station. Three years later, two board members of FIEA launched the South Fox Island Lighthouse Restoration Project to revive the preservation plans, and the group’s name was shortened to Fox Island Lighthouse Association (FILA), when it applied for non-profit status in 2005.
Since 2006, FILA has been making several trips to South Fox Island each year and has succeeded in calling attention to the light station and in stabilizing many of the structures on the island. In 2009, the association received $16,666 from the Michigan Lighthouse Assistance Program, which is administered by the State Historic Preservation Office and funded by proceeds from the sale of the “Save our Lights” license plate. FILA initiated a Camper Keeper Program in 2015 that allows people to camp on the island for several weeks while welcoming the occasional visitor and helping with maintenance and restoration.