The constructor who hides her own name in every grid she builds

The first time I asked Eliza Cartwright about her signature, in October on her front porch in Vermont, she made a small face and said: “I was hoping nobody would ever ask me about that on the record.”

Cartwright is 51, a former English teacher, a constructor of crossword puzzles since 2007, and — by an estimate that she would not confirm but did not contest — the most prolific independent puzzle constructor working in America today. She has placed puzzles in The New York Times, the Wall Street Journal, the LA Times, the New Yorker, the Atlantic’s short-lived crossword section, and roughly two dozen smaller markets. Her byline is, in the niche but loyal world of crossword obsessives, well-known.

Her signature is not.

The signature

I will not, in this article, tell you the four letters. Cartwright asked me not to. She will, however, confirm three things: the signature is four letters long, it appears in every published puzzle she has ever built since 2008, and it is hidden somewhere in the grid — not in the clues, not in the title, but in the actual filled-in grid — in a way that makes it functionally invisible unless you know what to look for.

“I started doing it as a private joke,” she told me, sitting at her kitchen table with a mug of tea and the draft grid for an upcoming WSJ Sunday in front of her. “The second puzzle I ever placed at the Times, in 2008, I noticed that the upper-left corner of my grid happened to spell my own initials reading down. I didn’t plan it. I just noticed it. And I thought — wouldn’t it be funny if I made that on purpose, every time, and never told anyone.”

So she did. For 18 years. In, by her own count, 743 published puzzles.

How nobody has noticed

Crossword grids are, on close inspection, full of accidental short words. A 15×15 grid contains roughly 38 entries averaging 5–6 letters each, plus the cross-letters that spell short three- and four-letter words at the intersections. The probability of any given four-letter sequence appearing somewhere in a grid is high.

Cartwright’s trick is that she places the signature in a structurally-required short word — a 3-letter or 4-letter answer that the grid’s symmetry forces to be there. The signature is therefore hidden inside an answer that the puzzle has to contain, in a position that the puzzle has to have. To anyone scanning the grid, it looks like a normal short answer. To Cartwright, it’s her name.

I asked her if any other constructors had ever spotted it. “One,” she said. “In 2014. He emailed me. He said ‘are you doing what I think you’re doing,’ and I wrote back ‘yes,’ and that was the end of the conversation. He has not, as far as I know, ever told anyone.”

The constructor in question, who Cartwright would not name, is one of the most prominent puzzle-makers in the field. He confirmed for me, by phone, that he had spotted Cartwright’s signature “sometime around 2013” and had “made a personal decision not to write about it.” Why? “Because it’s the kind of thing that, if you spoil it, the magic dies. I figured someone would catch her eventually. Apparently, no one has.”

The puzzles

The signature is, in some ways, the least interesting thing about Cartwright. Her puzzles are remarkable for other reasons.

She is one of the few constructors working today who has placed puzzles in every major American newspaper crossword and at least three major weeklies. Her output is enormous — she averages roughly 40 placed puzzles per year — and she does it from a small house in central Vermont, working five hours a day, mostly alone.

Her style is recognizable to dedicated solvers. She likes themes built around hidden phrases. She likes long-answer entries that contain a piece of unexpected wordplay. She has a marked aversion to crossword-ese (RAJA, EPEE, ESNE) and has, on multiple occasions, written editorial letters to crossword editors arguing for tighter constraints on overused short answers.

She also, more quietly, mentors. By her count, she has provided detailed feedback on roughly 200 first-time-published puzzles by younger constructors over the last decade, including most of the new wave of women and non-binary constructors who have entered the field in the last five years. Several of those constructors, when I reached out for this piece, called Cartwright the most generous mentor in modern American crossword construction. None of them knew about the signature.

The kitchen table

Cartwright builds her puzzles by hand, on graph paper, before transferring them to crossword construction software. She uses a 0.5mm mechanical pencil, a soft eraser, and a small notebook with the dates and titles of every puzzle she has placed since 2007. The notebook is, in essence, the only existing record of which 743 puzzles contain her signature.

I asked her if she would ever publish that record. She thought about it for a long moment.

“Maybe,” she said. “When I retire. Or when I die. I haven’t decided which.”

Then she went back to her grid.

Why this story

I came across the Cartwright signature — inadvertently, six months ago — while doing research for a different piece on hidden patterns in crossword grids. A statistician at MIT had run a probabilistic analysis of about 8,000 published American crosswords and flagged Cartwright’s output as having a statistically improbable density of one specific four-letter sequence. The MIT researcher’s working hypothesis was that Cartwright had, unconsciously, developed a vocabulary preference. When I emailed Cartwright with the data, her reply was three sentences long.

“The data is correct. The hypothesis is wrong. Please call me.”

Three months and one Vermont visit later, I had the rest of the story.

It is a small story. It will not change the way you solve a crossword. It will, however, change the way you look at a grid — once. Take any of Cartwright’s puzzles. Look closely at the short answers. Somewhere in there, four letters spell her name. They’ve been there for 18 years.

I won’t tell you which letters. That’s her trick. But she has built an 18-year secret into the most public-facing form of word puzzle on Earth, and almost nobody has caught her. That, by itself, is a small piece of crossword history.