L.B. Dupuis was bom in 1851, in Portland township, Frontenac county. He was the son of James Dupuis and his wife, Zabra Hegebone. He was distantly related to Nathan Fellows Dupuis, professor of science, for whom Dupuis Hall at Queen’s University is named.
Details of L.B. Dupuis’ early life are not known, but in 1876, he moved to Belleville to enroll in the Ontario Commercial College established by Messrs. Robinson and Johnson. He left the college in the summer of 1877 in order to become a school teacher. (It is possible that he had been teaching before he decided to attend the college.)
In 1878, he was teaching somewhere near Yarker, Ontario. On December 26, 1878, he married Alice E. Martin of Yarker. He continued to teach, but was much troubled by spiritual matters and may have been influenced by his wife’s family, who were prominent Methodists. In 1880 or 1881, the young couple decided to try their fortune in Manitoba, but the trip proved a failure. A baby daughter became ill, so the couple returned to Yarker, where the baby died. A second daughter, Edma Dupuis, was bom in Yarker in January 1884.
In 1887, Alice Martin Dupuis died of tuberculosis at the young age of 29. During her illness, L.B. Dupuis made up his mind to abandon teaching and enter the ministry. This he did, through the Montreal conference of the Wesleyan Methodist Church. By 1892, he was in Detroit, where he was ordained. He also married again. He continued to live and preach in Michigan, and died in Pontiac on Feb. 2, 1928.