Theodora Nwankwo-Speight, Who Kept The Sample That Is Not Rock, Dies At 91

SEABROOK, Tex. — Theodora Nwankwo-Speight died at home in Seabrook, Texas, on 11 August. She was 91. Her physician of nineteen years certified the cause as heart failure. There was no post-mortem, because none was required, and her nephew was in the house.

This desk records the manner of a death and declines to draw an inference from it. That rule is older than the story it is attached to here, and it is not suspended because the story is interesting.

In thirty-one years running the national lunar sample facility she signed out 2,196 allocations under her own signature. She published nothing in her own name. The one finding that would have made her famous she filed in a public register and left where anybody could ask for it.

Nought point four grams

On 8 March 1994 she cut a 6.2-gram split of sample 70217 for a thermal study that was then cancelled. Inside it was a metallic body weighing 0.4 grams.

It was layered. Under a microscope the layers ran unbroken around a curve, the grains were elongated about eight to one in a single direction, and bands of finer, recrystallised grain lay along the elongation.

That fabric is what a metal does when it is worked cold and then annealed. It is not what a droplet does when it freezes.

Two laboratories, neither told about the other

She sent 60 milligrams to a metallurgy institute and 60 milligrams to an electron-microscopy group, on the same day, by different couriers, with the same one-line question and no context whatever.

Dr. Halvard Okonjo-Brennan, who ran the first, did not learn until 1996 that the second existed. Dr. Marisol Etxeberria-Fadipe, who ran the second, says she assumed she was being asked about a machine part that had contaminated a laboratory.

Their reports agree on composition to within 0.4 per cent. Nickel above 34 per cent with cobalt at 0.28 puts the metal a long way off the meteoritic trend, on which those two elements move together in a fixed ratio.

On 14 November 1994 she filed both reports, and her own covering note, in the facility's public register as entries 94-2011 and 94-2019.

Why she would not publish

The covering note is four paragraphs long and her executor has kept all four drafts of it.

A published sample, she wrote, becomes a famous sample. A famous sample is withdrawn from general allocation and moved into protected status, where the people who can get at it are the people who already have standing.

So she asked that it not be published while she lived, and kept it allocatable for thirty-two years, and told the eleven researchers who did request material from ,411 exactly what was in it when they asked.

She was born in Enugu in 1935, took a doctorate in mineralogy, and joined the facility in 1971 as its most junior curator. Colleagues describe a woman who answered every letter, including the ones from children and the ones from cranks, and who allocated to a retired schoolteacher in Idaho on the same form she used for a national laboratory. Two of the compilers of the long-period event catalogue this newspaper holds as PX-1788 had their material from her.

What the third laboratory found

In May this newspaper bought 90 milligrams through the ordinary allocation process, masked the catalogue number, and paid Dr. Sunniva Achterberg-Rao to measure it blind.

Nickel 34.2 per cent. Cobalt 0.28. Grains elongated eight to one, recrystallised bands along the elongation. Three laboratories, thirty-two years apart, with no contact between any two of them, describing the same object.

She was alive when we commissioned it and we did not tell her. Our standards editor has written what she thinks of that, and it runs in the comparison box at the foot of this page.

The letters

Nine readers have written since Thursday to say that a woman of 91 who held that sample for thirty-two years did not simply die of her heart.

"She was well in June," writes Constance Aderinto-Blaylock of Tucson. "You will print the word heart failure and file her, and I am asking you not to."

"Fourteen requests were frozen on 12 June," writes Rowan Delacroix-Mbatha. "She died on 11 August. You are a newspaper. Do the arithmetic."

The arithmetic is two dates and no third thing between them. Heart failure is what stops a heart, and it is what most certificates say about people in their nineties. It is on the certificate, the certificate is correct so far as anyone can show, and I am not going to convert a coincidence into an implication by leaving a space where a conclusion should be. — G.A.

What she left is a 0.4-gram object that three laboratories agree was worked before it got where it was found, sitting in a drawer with a number on it, catalogued, findable, and — until 12 June — available to anyone who asked.

The asking is the part she built. Fourteen people are currently being told to wait.