The D'Arcy Archive
719 files and pages · 14 September 2026

Reading the archive against itself

Six open questions, answered or half-answered out of material this site had already published. No subscription, no archive, no letters — just reading what was written down.

Yesterday this archive discovered it had been calling Constantine D'Arcy unplaced on three pages while publishing his christening on a fourth. The obvious next question was how many of the other open questions were in the same condition. The answer is most of them.

Method

A tool, not a hunch

tools/crossread.py holds the open questions as search terms, reads every data file and every built page of this site, and prints each place the terms appear — excluding the page that owns the question. It finds nothing new in the world. It finds what was already here and not being read.

719 data files and pages. It runs in under a second, and it should have existed in July. tools/crossread.py

Question 1

Robert and Jean had ten children

This site's page on Robert D'Arcy's family listed FIVE, and added a sixth yesterday. The family tree it is built on holds TEN, and the Hornby page has said “ten children” in plain text for weeks. Three of them were born in Barbados and three of them died in Sussex.

ChildLifeBornDied
Joseph D'Arcy
documented
1780–1848 14 Mar 1780
Portsmouth
Lymington, Hampshire
Margaret Maria Isabella D'Arcy
documented
1781–1843 26 Sep 1781
Portsmouth
Le Havre, France
George Pitt D'Arcy
documented
1783–1849 18 Feb 1783
Portsmouth — “or West Indies”
Parramatta, New South Wales
Richard d'Arcy
inferred
b. 1784 1784
Portsmouth
—
Constantine D'Arcy
documented
1786–1805 Feb 1786
BARBADOS
Chatham, Kent
Jane D'Arcy
tree
1787–1875 15 Dec 1787
BARBADOS
FALMER, SUSSEX — aged 88
Catherine D'Arcy
tree
1789–1876 10 Dec 1789
BARBADOS
BRIGHTON — aged 86
Anna Maria D'Arcy
tree
1791–1791 16 May 1791
—
died 24 October, aged five months
Anna Maria d'Arcy
tree
1792–1800 10 Oct 1792
Portsmouth
died aged seven
Charlotte D'Arcy
tree
1794–1869 19 Oct 1794
LYME REGIS, DORSET
BRIGHTON — aged 74
And that answers a question this site opened yesterday. And that answers a question this site opened YESTERDAY. “What became of Jane D'Arcy, christened in Barbados in 1788 and untraced after it” — she was born on 15 December 1787, christened the following March, and died at Falmer outside Brighton in January 1875 at the age of eighty-eight. It was in the tree the whole time, and her christening date corroborates it: a December birth and a March baptism are the same child.Her brother →
AND THREE OF THEM HAVE SINCE BEEN DOCUMENTED. Jane, Catherine and Charlotte were added here on the authority of other people's web trees. All three now have civil death registrations in the Brighton district, Catherine has an obituary and a probate, and all three appear in one Brighton household in the 1841 census. documented The Sussex sisters →
Question 2

And the West Indies posting is bracketed without a single new record

The Corps page once showed what it called «a blank of twenty-four years» in Robert D'Arcy's career, between his commission of 17 January 1776 and his majority of 1802. The birthplaces of his own children close most of it.

1783George Pitt Portsmouth — “or West Indies”, says the tree, hedging
1784Richard Portsmouth
Feb 1786Constantine BARBADOS
Dec 1787Jane BARBADOS
Dec 1789Catherine BARBADOS
Oct 1792Anna Maria PORTSMOUTH — he is home
Oct 1794Charlotte Lyme Regis, Dorset
Out by 1786 at the latest and back by 1792 at the latest: a tour of something like five or six years, which is exactly what a Royal Engineer's West Indies posting looked like. None of this is a document — it is a family tree, and birthplaces on family trees are the softest thing in them. But it is a shape to test against the Ordnance Office papers rather than a void. The career →
Question 3

Robert D'Arcy has a brother nobody here has ever mentioned

The Hornby page argues at length about Robert's parentage — the Earl of Holderness, the inserted “Thomas (Francis) D'Arcy”, the tree contradicting itself. It has never once said that the same tree gives Robert a SIBLING, hanging off the same two parents.

CONSTANTINE D'ARCY · born 1759, BARBADOS · died 1778, CHATHAM · parents Thomas (Francis) D'Arcy and Margaret? D'Arcy — the same parents given to Robert

The tree's note on him reads: “Lt in the Royal Artillery. died s.p. 01/06/1778 appt to De Lancey's Brigade (Cornelius Dersey! original transcription). Probably about 19 yrs old.” De Lancey's Brigade was a Loyalist corps raised in New York for the American war. And the tree's note on ROBERT says he was “wrecked on his voyage to America to fight as a volunteer in the American war”, losing the papers that named his parents.

Read this with both hands. Treat this with both hands. The two Constantines share a birthplace, a place of death and an identical occupation string — “Royal Engineer 2lt West Indies” — while one note calls the elder Royal Artillery and the other Royal Engineers, and both are said to have died at about nineteen. That is the signature of ONE PERSON DUPLICATED AND BACK-DATED by twenty-seven years, with a Loyalist officer transcribed as “Cornelius Dersey” grafted on to explain him. It may equally be a real elder brother. What it is not is something this archive should have gone a fortnight without noticing. a lead, and a duplicate risk, and neither has been tested The parentage claim →
Question 4

Lydia has a birthplace, a death date and two parents

This site says of Hannah Saniger's mother: “FamilySearch's shared tree gives John Saniger a wife LYDIA JONES, 1770–1851 … It is not sourced.” True as far as it goes. What the page does not say is how much detail sits behind the name in this archive's own data.

Born13 March 1770, WOTTON-UNDER-EDGE, Gloucestershire
ParentsWILLIAM JONES and SARAH
MarriedJohn Saniger, 1797, Berkeley
Died7 JULY 1851, BERKELEY, Gloucestershire
All four are testable and none has been tested. A death at Berkeley in July 1851 falls inside civil registration and should be in the September quarter of the GRO index for the Thornbury district — free to search, and a certificate would give an age and a cause. A baptism at Wotton-under-Edge in March 1770 to William and Sarah Jones is an ordinary parish-register lookup. This archive spent a week deciding the name Jones was unevidenced and never once tried the two records that would evidence it. four testable claims, none tested Hannah's baptism →
Question 5

So does Catherine Cotton

Listed as an open question — “where did Catherine Cotton come from?” The tree answers it in four fields: born 11 OCTOBER 1746 AT BERKELEY, died 27 SEPTEMBER 1778 AT BERKELEY, married THOMAS SANIGER at Berkeley on 10 APRIL 1769, parents EDWARD COTTON and ELIZABETH. Berkeley St Mary's transcript stops in 1677, which is why nobody found her — but a marriage of 1769 and a burial of 1778 are within reach of the Gloucestershire Archives' own holdings, and the question was never framed that way.

Six generations at Berkeley →

Question 6

And Martha Wakefield, which went the other way

This site says Martha “may never have existed”: named on five pages, searched at Bristol under every spelling and every record type, and found nowhere. The crossread points at two things the Bristol search could not have reached.

The tree says she died in QUEENSLAND, not England23 April 1899, Maryborough — buried Maryborough Cemetery, Plot Monumental L, Grave 410
And it says she marriedIts source is cited as “Backhouse Web Site — MARTHA HURFORD (born Wakefield)”

So the search was run in the wrong country, under the wrong surname, for a woman whose own tree entry gives a death date, a cemetery and a plot number. That took ten minutes to test in the free Queensland index, and the answer is better than either side of the argument.

Death · MARTHA HURFORD · 23 April 1899 · Queensland 1899/C/3288

The tree's date, to the day. And the index names her parents: FATHER JOHN WAKEFIELD, MOTHER a HUGHES.

Death · MARTHA MILLINGEN · 19 July 1898 · Queensland 1898/B/30782

The other candidate — a Martha Wakefield did marry Philip Millingen in Queensland in 1887. Her parents are HENRY WAKEFIELD and CATHERINE DUNCAN.

No Martha Wakefield dies in Queensland at all, 1855–1960

And no Wakefield death anywhere in the index gives the parents James Wakefield and Hannah Saniger for a Martha.

So both sides of the old argument were wrong. Martha Hurford was real. She was not this family's daughter — she was John Wakefield's, by a Hughes. The tree grafted another man's child onto James and Hannah, and this archive then went looking for her in Bristol. The index does hold their children properly: Ephraim in 1868 as “Anna Sanniger”, Aaron in 1896 as “Hannah Sanegar”, Hiram in 1905 as “Hannah Sanigar”. There is simply no Martha among them. resolved against the tree The Wakefields →
The uncomfortable part

And the lesson had already been filed once

On 13 September this archive published an error about Jabez and Zillah Wakefield, announced as “two children nobody here had ever heard of” when both were on a passenger manifest it had transcribed itself in July. The lesson recorded at the time reads: “Check a discovery against what the archive already holds before calling it new. The tree is not the archive.”

Written down on the Saturday, and not applied on the Sunday. A lesson filed is not a lesson learned; the difference between them, in this case, is a fifty-line Python script. That is the actual finding of this page. Both entries →
One day later

Three of these are no longer open

This page was written on 13 September 2026 to say that six questions filed as open were answerable from what the archive already held. On 14 September three of them were carried further — not from the archive's own files this time, but from free sources nobody here had opened.

Lydia — Her death is located.

LYDIA SANIGAR, 1851, register 3, entry 265, in the free Gloucestershire Registration Service Index. The date the tree gives — 7 July 1851 at Berkeley — sits inside a district whose deaths are complete from 1837. She was invisible under SANIGER and present under SANIGAR. The certificate is now orderable against a local reference; her maiden name still needs it.

Where it is set out →

Catherine Cotton — Her family has its first document.

PROB 11/1056/294 — the will of BENJAMIN COTTON, cordwainer of Berkeley, proved 16 September 1779, eleven months after Catherine was buried in that parish. Her father is given as Edward, so Benjamin is not him; but this archive had never held a single record from the Cotton side, and a Berkeley Cotton's will is where her children would be named.

Where it is set out →

Barbados — The posting is documented, not bracketed.

This page bracketed the West Indies years from the birthplaces of Robert D'Arcy's children, with no record of the posting itself. The Corps' own history carries “ROBERT D'ARCY, BARBADOS” in a station list — and puts him at the siege of Fort St Philip's on Minorca in 1781, inside the blank this archive called empty.

Where it is set out →

The method still holds and the lesson is unchanged: read your own files before searching. But three of the six moved because somebody finally opened a printed book and a county index, both free, both sitting in plain sight for as long as this archive has existed. documented
tools/agree.py

And a second tool, for when the archive disagrees with itself

This page came out of a filing failure: a fact published on one page while three others called it unknown. A week later the same shape appeared in a different form — a DATE printed as 1776 on five pages and 1778 on a sixth, for weeks, with nothing in the build able to notice.

So there is now a second script. crossread.py reads this archive against its open questions; agree.py reads it against itself. For every person it names often and every event word that carries a date, it collects every year appearing near both and reports the pairs carrying more than one.

What it found, and what it did not

One real fault, immediately: six files still asserting 1778 after the date had been corrected to 1776 everywhere else — among them the script that GENERATES the register, which would have reproduced the wrong date on every future build. documented

Then thirty-one false alarms, all triaged

Every remaining pair was checked by hand and every one is a false positive, in three kinds. REPEATED FORENAMES: this family has a Thomas Saniger in 1677, 1744, 1769, 1803 and 1851, and a name-matcher sees one man with five dates. ADJACENT EVENTS: a marriage of 1779 sits one line above a baptism of 1780, and proximity cannot tell a neighbour from a contradiction. A BIRTH AND A LATE BAPTISM: “29 Apr 1825 / bapt. 31 Mar 1826” is one child, correctly recorded, eleven months apart.

And one thing it had to be taught

This archive states wrong dates ON PURPOSE. Its method is to print what was rejected — “the tree says 10 March 1824, ten months early” — so a page CORRECTING a date reads exactly like a page asserting it. The first version duly flagged /jean-ward for 1777 in a sentence that existed to rule 1777 out. Windows carrying a negation, or the archive's own correction idiom, are now skipped. the method defeats the checker, until the checker knows the method

It found one bug, it found it at once, and it has found nothing since. That is a reasonable thing for a check to do. The point of recording the thirty-one is that a long list from a tool is not a long list of problems, and saying so is part of running one.

What this cost

Six of the questions this archive has been carrying were answerable, or half-answerable, out of material it had already published. One of them it had published on the same page as the question. None of this required a subscription, an archive, or a reply to a letter. It required reading what was already written down, which is the one research method that costs nothing and the one this archive had not applied to itself.

The errors this produced → · What is still open → · What it would take to settle them →