Henry David Thoreau

The same failure, with the polarity reversed

Poe died in 1849, Thoreau in 1862; the same country, nearly the same decade, and the opposite accident. Poe’s science was filed as poetry. Thoreau’s data was filed as nature writing. In both cases the label was accurate. In both cases it was the label, and not the content, that did the sorting.

The difference is that Thoreau’s misfiling has been undone in our own lifetime, on the record, with a date: 2003. That makes him the cleanest case in this wing, because we can watch the whole cycle — measurement, dismissal, recovery, and then a field growing out of the recovery.

A surveyor who wrote, not a writer who measured

Thoreau earned his living as a land surveyor in Concord, and before that in the family pencil business, where he worked on the graphite. This is not a footnote to the literary life; it is the order of the thing. Measurement was the trade. The prose was the part he had to fight for. The map of Walden Pond printed in Walden is his own survey, drawn to scale, with soundings marked.

Read him as the Forest History Society reads him — a practical ecologist, surveyor and husbandman — and the notebooks stop looking like a hobby and start looking like what they are: instrument records, kept by someone whose day job was instrument records.

A hundred holes in the ice, and a rule

In the winter of 1846 Thoreau cut through the ice of Walden Pond and sounded it — more than a hundred soundings in all, with a cod line and a stone. Local opinion held the pond bottomless. He found the greatest depth to be, in his words, exactly one hundred and two feet: 31.09 metres, and a bottom.

Then he noticed something he could not leave alone. The line of greatest length across the pond intersected the line of greatest breadth exactly at the point of greatest depth. He proposed it as a rule — for ponds, then for harbours, and then, in the move only he would make, for a person: draw the lines of length and breadth through the aggregate of a man’s daily behaviour and their crossing gives you the depth of his character.

The companion script tests the rule. It builds basins on a grid, takes depth to fall off with distance from shore — which is the model the rule itself presupposes — finds the longest chord, the longest chord perpendicular to it, and the deepest point, and measures the miss. It measures to the nearest deepest cell, which is the reading most favourable to Thoreau.

The result: exact on a circle. Within 0.7% of the pond’s length on a 2:1 ellipse. Inside 9% on every convex basin tested — rectangle, teardrop, pear. And then it breaks on every concave one — crescent, hourglass, L-shape — missing by 17% of the length or more, at least twice the worst convex case. The rule is not about water. It is about the outline: it survives exactly as long as the shore does not turn back on itself.

Walden’s outline is convex and close to an ellipse. Thoreau tested his rule on the most favourable pond there is. He was right about Walden — and the extension to harbours, and to a character, is not carried by the measurement he made. That is a finding about a good observer, not a charge against him. He published the rule, the data and the map together, which is precisely what let someone check it a hundred and seventy-nine years later.

When the flowers opened, written down every year

For roughly the last ten years of his life Thoreau kept systematic records of Concord’s natural year: first flowering dates, leaf-out, ice-out, the arrival of birds. Hundreds of species, dated, in the same place, by the same observer, compiled into charts from 1860. He died of tuberculosis on 6 May 1862 with the project unfinished.

Emerson gave the eulogy at the First Parish meeting-house in Concord on 9 May, and delivered the verdict the next century kept: wanting ambition, “instead of engineering for all America, he was the captain of a huckleberry party.” It is affectionate and it is devastating, and it is the same sentence as the one about the Transcendentalist forester and the one about the prose poem. The work was read as a temperament.

The huckleberry party turns out to be the control group

Richard Primack, a biologist at Boston University, needed what climate ecology almost never has: an old, dated, local, single-observer record of when plants flowered, to compare against now. With Abraham Miller-Rushing he found Thoreau’s.

Concord’s spring is now about 6 °F warmer than in Thoreau’s decade — roughly 42 °F to 48 °F on the recent averages, which is 3.33 °C. Across 32 species the mean first flowering has moved from about 15 May to about 4 May: eleven days earlier. That implies about 3.3 days per degree Celsius, which sits squarely on the published community rate of around three. The notebooks are not a curiosity attached to a famous book. They are a calibrated instrument, and they agree with the instruments built since.

By 2008 the work was in Ecology. By 2012 it was in BioScience not as a result but as a template — how to uncover, collect and analyse historical records to measure ecological change, with Concord as the worked example. Historical phenology now has a protocol, and people run it on other people’s old notebooks in other towns.

An ecology paper before there was ecology

In September 1860 Thoreau read The Succession of Forest Trees to the Middlesex Agricultural Society. It was printed in the New-York Tribune and became the most widely read thing he published in his lifetime. In it he explains why a cut pine wood comes back as oak: seeds carried by wind and by squirrels, over years, not spontaneous generation. It is forest ecology, argued from observation, decades before the discipline existed to receive it.

The professionals did not take it up. The Forest History Society puts it plainly: foresters and loggers “could not accept the work of a Transcendentalist.” The gate again. The argument was not weighed and found wanting; the author was the wrong kind of person to be making it.

Five men, one filing error

Ramos, dos Anjos, Poe, Levi, Thoreau. The trait they share is not genius and it is not neglect — plenty of neglected people were simply wrong. It is that each one put his most exact work inside a container the reader was not expecting, and the container did the sorting. A mayor’s administrative reports. A poet’s cosmology. A chemist’s memoir. A surveyor’s field notebook. Verse with cellular decomposition in it. In every case the gate ran on the genre and never reached the content, and in every case somebody had to come back later and read it in the other register.

And then the sequel, which is the part worth building on: as soon as an idea is available to people, a valley opens for development, and branches become trunks. Thoreau’s notebook was a branch — a private side-habit of a man known for a cabin. The moment it was made available as data, in 2003, in a journal, in the vocabulary of phenology, a valley opened: a paper, then a method, then a field with a protocol that is now run on records Thoreau never touched. The branch is a trunk, and it has branches of its own.

The condition was never the quality of the observation. Thoreau’s numbers were just as good in 1862 as in 2003. What changed was that someone made them available — put them where the people who could use them were looking, in the words they use. That is the whole distance between a curiosity and a field. The wing’s control case is Paulo Freire, who did it on purpose, at cost, against a government.

The same year, and the essay that did not wait

In July 1846 — the same year he was cutting holes in the Walden ice — Thoreau spent a night in the Concord jail for refusing several years of poll tax, over slavery and the war with Mexico. Someone paid it and he was released the next day. He lectured on it at the Concord Lyceum in 1848 as The Rights and Duties of the Individual in relation to Government, and Elizabeth Peabody printed it in 1849 in her anthology Æsthetic Papers under the title Resistance to Civil Government.

It became Civil Disobedience in 1866, in a posthumous collection, four years after he died. The title it is famous under is not the one he gave it — this volume’s trait operating on a title instead of a genre, and for once in the work’s favour.

Then watch it move. Gandhi read it in South Africa and in 1907 called it exactly applicable to the Indians in the Transvaal; King said the teaching came alive in the sit-ins, the freedom rides and the bus boycotts. An essay in a one-issue anthology became the operating manual of twentieth-century nonviolent resistance.

That is the controlled experiment, and it is inside one life. The notebooks waited a hundred and forty-one years. The essay was in Gandhi’s hands in fifty-eight and in Alabama in a hundred. Same author, same decade, same care. What differed was the shelf it landed on and whether anyone was standing at it — the essay went into a reform anthology, in the vocabulary of people arguing about the state, addressed to the ones who would use it. The phenology went into a private diary. Neither was suppressed. One was available.

Claims and their status