In his book Walden, Henry David Thoreau declared his love of nature, simplicity, and independence. Although most people know about Thoreau’s time in Walden Woods, as well as his Transcendentalism, abolitionist views, and writing on civil disobedience, there’s a lot more to uncover about him. Here are some things you might not have known about Henry David Thoreau, who was born on July 12, 1817.

1. You're probably mispronouncing Henry David Thoreau's name.

Born in Concord, Massachusetts in 1817, David Henry Thoreau switched his first and middle names after graduating from Harvard. His legal name, though, was always David Henry. Although most people today pronounce Thoreau’s surname with the emphasis on the second syllable, he most likely pronounced it “THOR-oh.” Ralph Waldo Emerson’s son, Edward, wrote that the accent in Thoreau’s name was on the first syllable, and other friends called him “Mr. Thorough.”

2. Henry David Thoreau invented a machine to improve pencils.

In the 1820s, Thoreau’s father started manufacturing black-lead pencils. Between teaching students, surveying land, and working as a handyman, Thoreau made money by working for his family’s pencil business. After researching German techniques for making pencils, he invented a grinding machine that made better quality plumbago (a mixture of the lead, graphite, and clay inside a pencil). After his father died, Thoreau ran the family’s pencil company.

3. Henry David Thoreau accidentally burned hundreds of acres of woods.

In 1844, a year before moving into a house in Walden Woods, the 26-year-old Thoreau was cooking fish he had caught with a friend in the woods outside Concord. The grass around the fire ignited, and the flames burned between 100 and 300 acres of land, thanks to strong winds. Even years later, his neighbors disparagingly called him a rascal and a woods burner. In an 1850 journal entry, Thoreau described how the earth was “uncommonly dry”—there hadn’t been much rain—and how the fire “spread rapidly.” Although he initially felt guilty, he wrote that he soon realized that fire is natural, and lightning could have sparked a fire in the woods just as easily as his cooking accident did.

4. Henry David Thoreau's house at Walden Pond later became a pigsty.

After Thoreau left the home he built in Walden Woods in 1847, the structure went through multiple iterations. He sold the house to Emerson (it was on land that Emerson already owned), and Emerson sold it to his gardener. The gardener never moved in, so the house was empty until a farmer named James Clark bought it in 1849. Clark moved it to his nearby farm and used it to store grain. In 1868, the roof of the building was removed from the base and used to cover a pigsty. In 1875, the rest of the structure was used as a shed before its timber was used to fix Clark’s barn. Today, you can see replicas of Thoreau’s house near Walden Pond in Massachusetts.

5. Henry David Thoreau and his brother both fell in love with the same woman.

In 1839, Thoreau wrote in his journal about how he fell in love with Ellen Sewall, an 18-year-old from Cape Cod. In 1840, Thoreau’s older brother John proposed marriage to Sewall but was rejected. So, like any good brother, Thoreau wrote a letter to Sewall, proposing that she marry him instead. Sewall rejected him too, probably due to her family disapproving of the Thoreau family’s liberal views on Christianity.

Despite the aforementioned marriage proposal, some historians and biographers speculate that Thoreau was gay. He never married, reportedly preferred celibacy, and his journals reveal references to male bodies but no female ones.

6. Despite popular misconception, Henry David Thoreau wasn't a loner.

Historians have debunked the misconception that Thoreau was a selfish hermit who lived alone so he could stay away from other people. Rather than being a loner, Thoreau was an individualist who was close to his family members and lived with Emerson’s family (on and off) for years. To build his cabin in the woods, he got help from his friends including Emerson and Bronson Alcott, the father of Louisa May Alcott. During his stay in the woods, he frequently entertained guests, visited friends, and walked to the (nearby) town of Concord. At his funeral at Concord’s First Parish Church, a large group of friends attended to mourn and celebrate his life.

7. Henry David Thoreau was a minimalist.

Long before tiny houses were trendy, Thoreau wrote about the benefits of living a simple, minimalist lifestyle. In Walden, he wrote about giving up the luxuries of everyday life in order to quiet the mind and have time for thinking. “My greatest skill has been to want but little,” he wrote. Thoreau also related his love of simplicity to the craft of writing: “It is the fault of some excellent writers ... that they express themselves with too great fullness and detail. They give the most faithful, natural, and lifelike account of their sensations, mental and physical, but they lack moderation and sententiousness.”

8. Henry David Thoreau took copious notes.

Although he was a minimalist, Thoreau wrote an abundance of notes and ideas in his journals, essays, and letters. He jotted down his observations of nature, writing in detail about everything from how plant seeds spread across the land to the changing temperature of Walden Pond to animal behavior. In addition to his plethora of notes and environmental data, Thoreau also collected hundreds of plant specimens and birds’ eggs.

9. Henry David Thoreau was praised for his originality.

In 1862, newspapers widely reported the news of Thoreau’s death. Obituaries for the 44-year-old writer appeared in The Boston Transcript, The Boston Daily Advertiser, The Liberator, The Boston Journal, The New-York Daily Tribune, and The Salem Observer. The obituaries describe Thoreau as an “eccentric author” and “one of the most original thinkers our country has produced.”

10. Henry David Thoreau donated his collections to the Boston Society of Natural History.

After Thoreau’s death, the Boston Society of Natural History got a huge gift. Thoreau, a member, gave the society his collections of plants, Indian antiquities, and birds’ eggs and nests. The plants were pressed and numbered—there were more than 1000 species—and the Native American antiquities included stone weapons that Thoreau had found while walking in Concord.

11. Don Henley of the Eagles is a huge fan of Henry David Thoreau.

As a big fan of both Thoreau and Transcendentalism, musician Don Henley of the Eagles started The Walden Woods Project in 1990 to stop 68 acres of Walden Woods from being turned into offices and condominiums. The project succeeded in saving the woods, and today The Walden Woods Project is a nonprofit organization that conserves Walden Woods, preserves Thoreau’s legacy, and manages an archive of Thoreau’s books, maps, letters, and manuscripts. In an interview with Preservation Magazine, Henley described the importance of preserving Walden Woods: “The pond and the woods that inspired the writing of Walden are historically significant not only because they were the setting for a great American classic, but also because Walden Woods was Henry David Thoreau's living laboratory, where he formulated his theory of forest succession, a precursor to contemporary ecological science.”

This story has been updated for 2020.