January 7, 2026

Faith Afloat

The Halliwells’ Journey Into the Heart of Amazonia

by

Daniel Oscar Plenc

This article draws on the biographies of Jessie and Leo Halliwell from the Encyclopedia of Seventh-day Adventists (ESDA), available at encyclopedia.adventist.org. It was prepared by Dragoslava Santrac, ESDA managing editor.—Editors.

From the wide plains of Nebraska to the winding rivers of the Amazon, Leo and Jessie Halliwell chose a path, not of comfort, but of compassion and faith. With a single small boat and trust in a sovereign God, they carried healing, hope, and the gospel to the forgotten people of the Amazon rainforest.

How It All Began

Leo Blair Halliwell was born on October 15, 1891, in the farming community of Odessa, Nebraska. Life on the plains—milking cows before sunrise, guiding the plow, and harvesting with horses—taught him discipline. His father, Samuel, and mother, Mary, raised their children in a modest home across from the local school where Leo studied until the tenth grade. Bright and hardworking, he loved math and chemistry and dreamed of becoming an electrical engineer.

At 17, Leo began teaching to support himself and later enrolled at the University of Nebraska, Lincoln, working summers and odd jobs to pay his way. Meanwhile, Jessie Rowley, born on February 22, 1894, had moved with her family to Odessa. Jessie and Leo met as teenagers, fell in love, and became engaged, sharing dreams to study, marry, and build a life together.

While Leo studied engineering, Jessie trained as a nurse. One summer in Kearney, they attended a tent meeting, and Jessie accepted the Adventist faith and was baptized. Leo was unsure at first, but Jessie explained she would marry only someone who shared her beliefs. With an earnest heart Leo sought the Lord, found a church in Iowa, and was baptized. Two days after Jessie graduated in 1916, they married and started a life together with a shared purpose.

For several years Leo worked in engineering, but his heart grew restless. Reading about missionary pioneers inspired him, and Jessie’s steady faith made him believe they were made for something more. They spent time praying, reading the Bible, and seeking God’s guidance.

In 1920 Leo left his factory job to become a full-time minister. His first evangelistic campaign was unexpectedly placed in his hands when the leading preacher fell ill. God blessed, and soon Leo was asked to serve as a pastor. Then an even greater call came: an invitation to serve as missionaries in Brazil. Friends warned them, family ties could not support them, yet their hearts were filled with courage. Leo and Jessie stepped forward, ready to leave behind comfort and follow Christ into the unknown, trusting that the same God who called them would also go with them.

From Prairie Dreams to a Higher Calling

On October 15, 1921, Leo and Jessie Halliwell and their son, Jack, left the familiar soil of America and set their course for Brazil. With faith stronger than fear, they arrived in Rio de Janeiro two weeks later and were warmly welcomed by fellow workers. Soon after, they journeyed to Salvador, Bahia, where Leo was appointed president of the Bahia Mission, and Gustavo Storch, son of Brazilian Adventist pioneers Guilherme and Emilia Storch and an evangelist, joined as secretary.

With unwavering faith Leo and Jessie stepped forward, ready to leave behind comfort and follow Christ into the unknown, trusting that the same God who called them would also go with them.

Their mission headquarters was a simple, old two-story house in downtown Salvador, which also served as their home. The work was challenging because there were only a few Adventists in the area and local beliefs were strong. Yet, instead of shrinking back, the Halliwells pressed forward. Leo diligently studied Portuguese, and Jessie used her nursing skills to help the community by delivering babies, tending the sick, and winning hearts with compassion.

In August 1922 their daughter Marian was born. That same month Leo embarked on his first mission tour with Gustavo Storch. For more than two months they traveled by train, boat, and donkey across rugged terrain, visiting families, preaching, and sharing copies of O Atalaia, the Adventist magazine. Small groups of believers sprang up in places like Porto Velho and Sítio do Mato—evidence that God’s Spirit was at work.

Years of patient labor bore fruit. On March 7, 1925, Leo was ordained to the gospel ministry at a workers’ conference in São Paulo. It was a moment of consecration, the outward sign of an inward call that had begun years earlier in the heart of a young engineer who once dreamed only of building dams and turbines.

The seven years the Halliwells spent in Bahia were difficult. They faced a new culture, a different language, and many other challenges. Even so, they saw God provide for them. Their old house became a mission center, Jessie’s nursing became a powerful way to share their faith, and even impassable jungle trails became paths of the gospel.

A Vision on the Amazon

In 1928 Leo and Jessie Halliwell received a new call—this time to the vast, challenging territory of the Lower Amazonas Mission. Stretching across five Brazilian states and three federal territories, it covered more than 1.6 million square miles (4.3 million square kilometers), with 2 million people scattered along more than 40,000 miles (64,000 kilometers) of rivers. The work seemed overwhelming, but the Halliwells accepted the call and moved with their two young children to Belém, Pará.

The mission rented a house that served as both their home and a church. The Halliwells soon saw that people in the Amazon faced poverty, superstition, and many diseases. Traveling by river was hard and sometimes dangerous, with long trips in canoes or crowded boats. Leo started to imagine having their own small boat to bring help and hope to the villages along the rivers.

During a short trip to the United States in 1930, Leo learned about tropical diseases, raised money, and designed the boat himself. Shipbuilders used local Amazon wood to build a strong 30-foot boat with living space, a small clinic, and storage for supplies. On July 4, 1931, they named the boat Luzeiro I, which means “Light Bearer.”[1] Jessie broke a bottle of guaraná over the bow to dedicate it to God’s work.

Light on the River

That first journey carried them roughly 900 miles (1,400 kilometers) upriver to Maués. From then on, the Luzeiro became a beacon of hope. Six months each year the Halliwells traveled between Belém and Manaus, covering up to 12,000 miles (19,000 kilometers). By day, patients lined the riverbanks, waving cloths to signal for help. Jessie, with her nursing skills, treated malaria, infections, ulcers, tropical diseases, and countless wounds. Leo preached at night, leading meetings on health, family, and faith. “As the result of the medical work,” he wrote, “we find open doors everywhere in the whole north of Brazil.”[2]

The Luzeiro was more than a boat. It was a floating clinic, a home, and a place of worship and care. It brought the gospel to places unreachable by road, giving hope to thousands who had never heard about Jesus. The Halliwells visited indigenous communities, made friends, and helped start schools among tribes such as the Maués and the Mundurucus. Leo made sure to get official permission for each stop, so their medical and spiritual work could continue without problems. Their kindness made a bigger impact than words alone.

Growing the Vision

By 1936 the Halliwells had expanded their work so significantly that the Lower Amazonas Mission became the North Brazil Union Mission. Leo became its first president, leading a small group of members spread across a huge area with only one organized church.[3] The task was staggering.

Life on the Amazon was never without serious challenges. They faced tropical diseases, river storms, and the dangers of traveling through the jungle. Still, they often saw signs of God’s care. After 17 years of service, Leo and Jessie both became sick with malaria, recovered, and kept working. While on leave in the United States, they studied tropical medicine at Loma Linda, wanting to return better equipped to serve others.

Soon Luzeiro I was joined by new boats: Luzeiro II in 1941, III in 1948, and many more. Missionaries such as Frederik and Esther Pritchard joined the work, bringing doctors, nurses, and pastors to many river villages. Through medicine, preaching, and worship services, entire communities were touched by the gospel.

Jessie often told Leo that medical ministry was essential to their mission. In 1942 they opened a small clinic in Belém. Through faith and hard work, it grew. The world church’s Sabbath School offering helped build a modern hospital, which opened in 1953 with 45 beds and housing for staff.

Adventist membership had grown from 10 to more than 2,500, with 20 churches, 70 workers, 52 Sabbath Schools, 15 church schools, 19 teachers, and four medical boats still serving.

What began with a single boat grew into a network of clinics, churches, and schools across northern Brazil. Luzeiro I served for 67 years before it was placed in the Amazonia Adventist College museum. The work continues. In 2017 Luzeiro XXX was launched, carrying the same light of healing and hope.

A Legacy of Light

In 1955 Leo left his leadership role but kept managing the Luzeiro boats. When the Halliwells returned to the United States in 1958, they left a changed mission field. Adventist membership had grown from 10 to more than 2,500, with 20 churches, 70 workers, 52 Sabbath Schools, 15 church schools, 19 teachers, and four medical boats still serving. The Halliwells are believed to have treated about 250,000 patients. Their work helped raise awareness about public health along the Amazon coast.

After a life of dedicated service, Jessie passed away at 68 on September 27, 1962, after a quiet battle with cancer.[4] She was buried in Tulare Cemetery, Tulare, California. On her gravestone, beneath the carving of a small mission boat, are the words: She fulfilled her mission of love. Leo died at 74 on April 19, 1967,[5] and was buried beside her, with the inscription: He Lived to Serve.

Leo and Jessie Halliwell’s mission work along the Amazon brought them recognition both in Brazil and abroad. The 1956 issue of Reader’s Digest shared their story worldwide.[6] In 1958, the Brazilian government awarded them the Order of the Southern Cross, one of its highest honors, for their 37 years of dedicated service in Brazil.[7] Jessie was the first woman ever to receive it, recognized for her compassionate medical and spiritual service. Posthumous tributes include dedicating Belém Hospital’s Emergency Care Unit to Jessie in 2014 and declaring Leo an honorary “Citizen of Pará” in 2015.

But their real reward was not in medals or honors. It was in the many lives changed by Christ’s love through their work. While the world may recognize faithful service, the greatest honor will come in heaven when Jesus says, “Well done, good and faithful servant” (Matt. 25:21).

[1] L. M. Stump, “New Church at Maues, Brazil,” Review and Herald, Sept. 23, 1948, p. 15.

[2] Leo Halliwell, Light Bearer to the Amazon (Nashville: Southern Pub. Assn., 1945), p. 72.

[3] “North Brazil Union Mission,” Seventh-day Adventist Yearbook (Washington, D.C.: Review and Herald Pub. Assn., 1937), p. 180.

[4] F. R. Millard, “Death of Four Veteran Workers,” Review and Herald, Oct. 18, 1962, p. 24.

[5] “In Remembrance,” Adventist Review, July 6, 1967, p. 24.

[6] Clarence H. Hall, “Medicine Man on the Amazon,” Reader’s Digest, October 1956, pp. 103-108.

[7] B. M. Preston, “Brazil Honors the Halliwells,” Review and Herald, Jan. 21, 1960, pp. 20, 21.

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About the Author

Daniel Oscar Plenc, Th.D. (River Plate Adventist University, Entre Ríos, Argentina), is a theology professor and director of the White Research Center at River Plate Adventist University.

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