Geoffrey Holt was unassuming as the caretaker of a mobile home park in Hinsdale, New Hampshire, where he lived a simple, but curious life.

Residents would see Holt around town in threadbare clothes — riding his lawn mower, headed to the convenience store, parked along the main road reading a newspaper or watching cars pass.

He did odd jobs for others, but rarely left town. Despite having taught driver’s ed to high schoolers, Holt had given up driving a car. He opted for a bicycle instead and finally the mower. His mobile home in the park was mostly empty of furniture — no TV and no computer, either. The legs of the bed went through the floor.

“He seemed to have what he wanted, but he didn’t want much,” said Edwin “Smokey” Smith, Holt’s best friend and former employer.

But Holt died earlier this year with a secret: He was a multimillionaire. And what’s more, he gave it all away to this community of 4,200 people.

His will had brief instructions: $3.8 million to the town of Hinsdale to benefit the community in the areas of education, health, recreation and culture.

“I don’t think anyone had any idea that he was that successful,” said Steve Diorio, chairperson of the town selectboard who’d occasionally wave at Holt from his car. “I know he didn’t have a whole lot of family, but nonetheless, to leave it to the town where he lived in … It’s a tremendous gift.”

The money could go far in this Connecticut River town sandwiched between Vermont and Massachusetts with abundant hiking and fishing opportunities and small businesses. It’s named for Ebenezer Hinsdale, an officer in the French and Indian Wars who built a fort and a grist mill. In addition to Hinsdale’s house, built in 1759, the town has the nation’s oldest continually operating post office, dating back to 1816.

There’s been no formal gathering to discuss ideas for the money since local officials were notified in September. Some residents have proposed upgrading the town hall clock, restoring buildings, maybe buying a new ballot counting machine in honor of Holt, who always made sure he voted. Another possibility is setting up an online drivers’ education course.

Organizations would be be able to apply for grants via a trust through the New Hampshire Charitable Foundation, drawing from the interest, roughly about $150,000 annually.

Hinsdale will “utilize the money left very frugally as Mr. Holt did,” said Kathryn Lynch, town administrator.

Holt’s best friend Smith, a former state legislator who became the executor of Holt’s estate, had learned about his fortune in recent years.

He knew Holt, who died in June at age 82, had varied interests, like collecting hundreds of model cars and train sets that filled his rooms, covered the couch and extended into a shed. He also collected books about history, with Henry Ford and World War II among his favorite topics. Holt had an extensive record collection too, including Handel and Mozart.

Smith also knew that Holt, who earlier in life had worked as a production manager at a grain mill that closed in nearby Brattleboro, Vermont, invested his money. Holt would find a quiet place to sit near a brook and study financial publications.

Holt confided to Smith that his investments were doing better than he had ever expected and wasn’t sure what to to do with the money. Smith suggested that he remember the town.

“I was sort of dumbfounded when I found out that all of it went to the town,” he said.

One of Holt’s first investments into a mutual fund was in communications, Smith said. That was before cellphones.

Holt’s sister, 81-year-old Alison Holt of Laguna Woods, California, said she knew her brother invested and remembered that not wasting money and investing were important to their father.

“Geoffrey had a learning disability. He had dyslexia,” she said. “He was very smart in certain ways. When it came to writing or spelling, he was a lost cause. And my father was a professor. So, I think that Geoff felt like he was disappointing my dad. But maybe socking away all that money was a way to compete.”

She and her brother grew up in Springfield, Massachusetts. Their father, Lee Holt, taught English and world literature at American International College. Their mother, Margaret Holt, had a Shakespearean scholar for a dad. She was an artist who “absorbed the values of the Quaker Society of Friends,” according to her obituary. Both parents were peace activists who eventually moved to Amherst and took part in a weekly town vigil that addressed local to global peace and justice issues.

Their children were well-educated. Geoffrey went to boarding schools and attended the former Marlboro College in Vermont, where students had self-designed degree plans. He graduated in 1963 and served in the U.S. Navy before earning a master’s degree from the college where his father taught in 1968. In addition to driver’s ed, he briefly taught social studies at Thayer High School in Winchester, New Hampshire, before getting his job at the mill.

Alison remembers their father reading Russian novels to them at bedtime. Geoffrey could remember all those long names of multiple characters.

He seemed to borrow a page from his own upbringing, which was strict and frugal, according to his sister, a retired librarian. His parents had a vegetable garden, kept the thermostat low, and accepted donated clothes for their children from a friend.

She said Geoffrey didn’t need a lot to be happy, didn’t want to draw attention to himself, and might have been afraid of moving. He once declined a promotion at the mill that would have required him to relocate.

“He always told me that his main goal in life was to make sure that nobody noticed anything,” she said, adding that he’d say “or you might get into trouble.”

They didn’t talk much about money, though he would ask her often if she needed anything.

“I just feel so sad that he didn’t indulge himself just a little bit,” she said.

But he never seemed to complain. He also always wasn’t on his own, either. As a young man, he was briefly married and divorced. Years later, he grew close to a woman at the mobile home park and moved in with her. She died in 2017.

Neither Alison nor Geoffrey had any children.

Holt suffered a stroke a couple of years ago, and worked with therapist Jim Ferry, who described him as thoughtful, intellectual and genteel, but not comfortable with following the academic route that family members took.

Holt had developed mobility issues following his stroke, and missed riding his mower.

“I think for Geoff, lawn mowing was relaxation, it was a way for him to kind of connect with the outdoors,” Ferry said. “I think he saw it as service to people that he cared about, which were the people in the trailer park that I think he really liked because they were not fancy people.”

Residents are hoping Hinsdale will get noticed a bit more because of the gift.

“It’s actually a forgotten corner in New Hampshire,” said Ann Diorio, who’s married to Steve Diorio and is on the local planning board. “So maybe this will put it on the map a little bit.”

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McCormack reported from Concord, New Hampshire.

Original: Fortune | FORTUNE: New Hampshire town gets $3.8 million gift from secret millionaire’s will