Everyone imagines the same origin story: a Southern woman sits down and pours out a masterpiece. What actually happened was slower and far more collaborative than the legend lets on, and it ran through a cold New York apartment, an airline switchboard, and a check from two friends.

The Direct Answer
Slowly, over roughly two to three years, by reshaping an earlier manuscript into the novel we know.
She wrote in New York, first around an airline reservations job, then full time after a 1956 gift freed her year.

A Check That Bought a Year

By the mid-1950s, Lee was living in New York and paying the rent with an airline reservations job, first with Eastern Air Lines and later the British carrier BOAC. Writing happened around the shifts, at night and on days off, in a modest cold-water apartment where the ambition was a lot bigger than the square footage. She'd left law school in Alabama and moved north to try to become a writer, and for years the trying looked like a lot of clerking and very little published work. Then Christmas of 1956 changed the arithmetic of her days. Her friends Michael and Joy Brown, who didn't have much to spare themselves, handed her an envelope. Inside was a year's wages and a note telling her she had one year off from her job to write whatever she pleased. She could have treated it as a cushion. Instead she treated it as a deadline. For the first time she could sit down at the typewriter in the morning without a switchboard shift waiting for her at the other end of the day.

Draft After Draft With Tay Hohoff

In the spring of 1957 she sent a manuscript called Go Set a Watchman to her agent, Maurice Crain. It made its way to the publisher J. B. Lippincott, where an editor named Tay Hohoff read it and saw two things at once: a real writer, and a book that wasn't a book yet. Hohoff thought the pages read more like a series of anecdotes than a finished novel, and she told Lee so. What followed was close to two years of rebuilding. Lee moved the center of the story back into the narrator's childhood, cut whole sections, rewrote others, and reordered the rest, working through draft after draft with Hohoff pushing at every turn. This wasn't a light polish on a finished thing. It was a structural rebuild, and Lee did the heavy lifting page by slow page. The manuscript that began life as Watchman eventually became To Kill a Mockingbird, and Lippincott published it on July 11, 1960.

Part of what made the rebuild so slow was the shape of the raw material. Lee's early pages read less like a single driving story and more like a collection of linked scenes and remembered episodes from a childhood in a town like her own. Turning that into a novel with a spine meant deciding what the book was actually about, then cutting everything that didn't serve it. She did that at a painstaking pace, the same slow crawl that marked all her work, often measuring progress in a page or so a day. Two friends had bought her a single year of freedom. The book, in the end, took closer to three.

There's a well-worn story from those years. One discouraged winter night, Lee is said to have thrown her pages out the window and into the snow, then phoned Hohoff, who told her plainly to go back out and pick them up. Whether the details have been buffed by retelling or not, the anecdote fits the texture of the work: doubtful and exhausting, and stubborn enough to finish.

I was a first-time writer, so I did as I was told.

Harper Lee, on working with her editor

For the fuller picture of her hours, habits, and quirks, see the full Harper Lee writing routine.

What You Can Steal