Research & Resources

Sources on Jean Cassaigne

Primary letters, archival records, books, videos, and online resources — everything available for research on the life and cause of Bishop Jean Cassaigne, MEP.

Note: Cassaigne left behind an unusually rich primary record — personal letters, a 1943 public presentation on leprosy, 30 years of mission reports to MEP, and the documented words of his patients. The major archive is at IRFA / MEP, 128 rue du Bac, Paris (largely untranslated). A 2022 photobook contains 174 archival photos and 39 original citations.

Cause for Beatification

Servant of God

In April 2021, all 27 bishops of the Vietnamese Episcopal Conference unanimously approved advancing Jean Cassaigne's cause. The diocesan inquiry is open in the Diocese of Đà Lạt, in cooperation with the Missions Étrangères de Paris (MEP). He was one of 25 missionary witnesses chosen by the Vatican for the Extraordinary Missionary Month (October 2019).

Servant of God Diocesan Inquiry Open ✦ Venerable Blessed Saint

Primary Sources — His Own Words

Documented letters, speeches, and spoken statements attributed to Jean Cassaigne

"I who made of my poverty a pride and my joy — here I am, become a prince of the Church. But I tell them all: they will change my costume and my cage, but they will not change the man."

Letter to his father, on being appointed Bishop of Saigon, 1941 A1

"I ask your Excellency to allow me to submit my resignation to the Holy See and to retire to the leprosarium of Djiring, near my children whom I have the most beloved and whom, in his goodness, the divine Master allows me to resemble."

Letter to MEP Superior, March 5, 1955 A2

"In leaving Saigon, I regret nothing, I have lost nothing — on the contrary, I won everything. I did my duty there for fourteen and a half years and I am sometimes surprised to have been able to hold out for so long."

Letter to his cousins in Urgons (Landes), 1955 A3

"What I feared most was not death, but a wound that would have prevented me from giving myself to the missions."

Letter (wartime period), on fear of wounds vs. death A5

"The villagers take them into the forest, build them a thatched hut and leave them there alone to live or die. Then, weak and lonely in the deserted hut, the lepers no longer have the strength to do anything... They will slowly die a miserable death, will collapse in some corner and die of hunger and cold, without anyone knowing."

1943 Saigon public presentation on leprosy in the highlands A6

"Une grâce." ("A grace.")

His two-word response when told he had leprosy, December 1954 — recorded in the MEP obituary by Father Fernand Parrel B1

"Well, here's a good one — they just bombed me into being a bishop!" (Il m'en arrive une bien bonne… on vient de me bombarder évêque!)

To French friends at the bungalow, on learning of his episcopal appointment, 1941 B2

"I have only three wishes in my life: to endure, to suffer, and to die here, among my Montagnards."

Said repeatedly in his final years at Di Linh B4

"Vietnam is my homeland. God wanted it that way. My dream will soon come true: I held on, I suffered here, I am going to die and want to be buried with my children, in the mountain country."

At his sickbed, to General Nguyễn Văn Hiếu's representative, April 12, 1972 B5

"The good Lord loves me, because he chose for me the best prayer, which is suffering — the one he reserves for friends."

Said to friends near the end of his life B6

"I ask those who, while alive, I could not help, please forgive me."

His tombstone epitaph — written at his own request. Di Linh leprosarium bell tower. D3

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Words of His People

Documented K'Ho and Vietnamese voices

"Cau dông! Ăn rốp kăh ứh mê đát ăn gũh re hồ trố"

"Oh, my lord! I will remember you when I am in Heaven."

Ka Trut's dying words to Jean Cassaigne, December 7–8, 1927. K'Ho original + translation. Source: Father Giuse Phung Thanh Quang, Optimism in the Highlands (1972). C1

"Oh cau duong! Oh cau duong! Dan nđắc sơngit bol hi!"

"Oh big man! Oh big man! Have mercy on us!"

K'Ho lepers calling from the forest — the founding cry of Làng Vui (Village of Joy), ca. 1928–1929. K'Ho original + translation. Source: Father Giuse Phung Thanh Quang. C2

"O Father, you have shown us the true way to heaven... Today we want to live your teaching, to keep alive the bond of love between us and the way you loved us, to suffer in our flesh of sorrow, as you taught us to suffer during your life among us... Pray for us that one day the Lord may consider us worthy to join you in his paradise."

Address by the Di Linh leper community at Jean's funeral, November 5, 1973. Source: Vatican October 2019 Missionary Month testimonies. C3

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Books & Print

Published works about or by Jean Cassaigne

Jean Cassaigne (1895–1973), l'Évêque des Lépreux

Book

Les Amis de Mgr Jean Cassaigne / Groupe Scolaire Jean Cassaigne · 2022 · French · 17€

Photobook with 174 archival photos and postcards and 39 original citations from Cassaigne himself. The most complete visual record available. Sold to fund a statue in Grenade-sur-l'Adour. Essential for any researcher.

174 photos 39 original citations French only
IRFA page

Jean Cassaigne — Au Service des Oubliés

Book

Frédéric Sudupé · Éditions Passiflore · 2024 · French

A recent biography focused on his service to the forgotten — lepers, highland peoples, and the marginalized of French Indochina. Likely the most up-to-date French-language narrative biography.

French Biography 2024
Publisher page

Jean Cassaigne — Missionnaire et Évêque au Vietnam

Book

Librairie Téqui · French · Available

Published by the Catholic bookseller Téqui, this is the primary French-language popular biography available through religious book channels.

French Catholic press
Librairie Téqui

Optimism in the Highlands

Book

Father Giuse Phung Thanh Quang · 1972 · Vietnamese

Written while Cassaigne was still alive and suffering, this is the primary Vietnamese-language source for the founding stories — including the Ka Trut baptism, the K'Ho lepers' cry from the forest, and direct quotes from Jean. The K'Ho original phrases cited throughout this project come from this book. No English translation is known to exist.

Vietnamese only K'Ho primary quotes Ka Trut source 1972 — written while Jean lived

K'Ho–French–Vietnamese Dictionary

Primary

Jean Cassaigne, MEP · Published 1929 · Also: Customs of the Highlanders (1937)

Cassaigne's own linguistic work — the dictionary he began as a blank notebook given to him in language school, completed over three years of learning K'Ho from village children. Also published Les Coutumes des Montagnards (1937) on K'Ho customs. Copies may be held at IRFA/MEP Paris and the Bibliothèque Nationale de France.

Jean's own work K'Ho language Published 1929
IRFA archive record

Video

Documentaries and visits to Di Linh

He Had Leprosy… But Chose to Stay in Vietnam

Video

YouTube · Vietnamese · 2025 · ~22 min

A thorough Vietnamese-language documentary covering his life from WWI through his death at Di Linh. Includes footage from the leprosarium and the grave site. Subtitles not available in English, but the visual record of Di Linh today is invaluable.

"Tôi là người Pháp, nhưng trái tim tôi là của người Việt Nam. Tôi muốn sống trong đau khổ và chết nơi đây. Việt Nam là quê hương của tôi."
("I am French, but my heart belongs to Vietnam. I want to live in suffering and die here. Vietnam is my homeland.")
Vietnamese Di Linh footage 2025
Watch on YouTube

Visit to the Grave of Bishop Jean Cassaigne

Video

YouTube · Vietnamese · 2025 · ~30 min

A pilgrimage-style video to the Di Linh leprosarium complex — shows the bell tower, the grave at its foot, the treatment center still operating today, and reads from his biography. The only known video tour of his burial site.

Vietnamese Burial site Di Linh today 2025
Watch on YouTube

Điểm Sách: Đức cha Jean Cassaigne — Vatican News Vietnam

Video

YouTube · Vatican News Tiếng Việt · 2024 · Book review / discussion

The Vatican News Vietnamese channel's book review and discussion of the Cassaigne biography as the Diocese of Đà Lạt advances his beatification cause. Shows the active engagement of the Vietnamese Church with his cause.

Vietnamese Vatican News Beatification context
Watch on YouTube
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Online Articles & Resources

The best English, French, and Vietnamese web sources

The Life of Monsignor Cassaigne in Indochina

English

saigon-vietnam.fr · Most complete English narrative

The most thorough English-language biography online. Contains direct quotes, the full Ka Trut baptism account, the Japanese occupation scenes (Colonel Amano, the refusal), the leprosy diagnosis, and the return to Di Linh. The essential starting point for English-language research.

Read article

Supporting Tribal Lepers — Jean Cassaigne

English

Mercy Charity · mercycharity.net

Contains the K'Ho primary source quotes (Ka Trut's dying words, the lepers' forest cry), the tombstone epitaph, the funeral address by the leper community, and additional material from Father Phung Thanh Quang's 1972 book. The best source for the K'Ho linguistic material in English.

K'Ho quotes Ka Trut baptism Tombstone text
Read article

French Missionary's Legacy Lives On Among Vietnam's Lepers

English

UCA News · July 2020

English-language news reporting on the living legacy of Cassaigne at Di Linh as the beatification cause advances. Includes photos from the UCA News archive — some of the best quality photographs of Jean with the leper community.

UCA News

Mgr Jean Cassaigne (MEP, 1895–1973) — MEP Official Page

French

missionsetrangeres.com · Missions Étrangères de Paris

The official MEP page on Cassaigne. Contains the obituary by Father Fernand Parrel — the primary source for the Colonel Amano sword episode, the "une grâce" response, and the "exempla trahunt" note about Amano's later baptism. The most theologically rich source document.

MEP official Amano sword — source "Une grâce" — source
MEP page

Vatican October 2019 — Missionary Witnesses

Vatican

vatican.va · October 2019 Extraordinary Missionary Month

Cassaigne was one of 25 missionary witnesses selected by the Vatican for the Extraordinary Missionary Month (October 2019). The official Vatican document contains his profile and contributed to the Vietnamese bishops' decision to formally open his beatification cause in 2021.

Vatican PDF

Catholic Hierarchy — Full Biographical Record

English

catholic-hierarchy.org · David M. Cheney

Complete dated record of every episcopal event in Cassaigne's life — ordination as deacon (June 6, 1925 — Pentecost Ember Saturday), priestly ordination, episcopal appointment, resignation, and death. The authoritative English reference for dates.

Dates / chronology Episcopal record
Catholic Hierarchy

Jean Cassaigne — Wikipédia (French)

French

fr.wikipedia.org

The French Wikipedia article is substantially more complete than the English version. Contains the letter to his father ("they will not change the man"), his wartime letters, the episcopal consecrators' names, and references to his published linguistic works.

Wikipédia (fr)

Groupe Scolaire Jean Cassaigne — Biography

French

gs-cassaigne.fr · School named in his honor, France

A French school bears his name. Their biography page offers a concise institutional summary of his life. Confirms the active memory of Cassaigne in his home region (Landes, France).

Visit page

Vietnamese Bishops Approve Beatification Cause

Vietnamese

ubdkcgvn.org.vn · 2021 · Vietnamese Episcopal Conference news

Vietnamese-language report on the April 2021 episcopal conference decision: all 27 Vietnamese bishops unanimously approved advancing the beatification cause of Bishop Jean Cassaigne. The formal institutional record of the cause's current status.

Read (Vietnamese)

50th Anniversary — The Ka Trut Baptism Statue

Vietnamese

cgvdt.vn · October 2023

On the 50th anniversary of his death (2023), a commemorative statue was erected depicting Cassaigne baptizing Ka Trut. This article interviews the sculptor and confirms the enduring centrality of the Ka Trut baptism to his memory in Vietnam.

Ka Trut baptism 50th anniversary 2023
Read (Vietnamese)
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Archives (Untranslated / In-Person)

Primary archive collections requiring direct contact

MEP / IRFA Archives — Paris

Archive

128 rue du Bac, Paris 7e · Institut de Recherche France-Asie

The motherlode. Holds decades of Cassaigne's annual mission Compte-rendus (official reports to MEP, 1926–1955), correspondence in the Bulletin des MEP, articles in Échos de la Rue du Bac across 30+ years, and his missionary personnel file. Almost entirely in French, largely digitized or catalogued but not publicly translated.

Annual mission reports Correspondence French only In-person / by appointment
IRFA catalogue entry

Diocese of Đà Lạt — Beatification Files

Archive

Toà Giám Mục Đà Lạt · Lâm Đồng Province, Vietnam

The Diocese of Đà Lạt is leading the diocesan inquiry for beatification. Their files include witness testimonies, collected documentation, and the formal ecclesiastical record of the cause. Access requires direct contact with the diocesan postulator.

Active beatification files Vietnamese / Latin Restricted access

Di Linh Leprosarium — On-site Albums

Archive

Trung Tâm Điều Trị Phong Di Linh · Bảo Thuận, Di Linh, Lâm Đồng

The leprosarium Jean founded is still operating, run by the Daughters of Charity. Multiple sources confirm that photo albums documenting Cassaigne's life and work are held on-site and were shown to researchers who visited. Includes images of Jean caring for patients, building activities, and community life that have not been published online.

Still operating Photo albums on-site Daughters of Charity