[1] He graduated from the Collège Saint-Amand in Kortrijk in 1863, then entered the American College of the Immaculate Conception of Louvain in Leuven to study for the priesthood, with the intent to do missionary work across the Atlantic Ocean in the !

[2] He spent a few months in Portland as secretary to Bishop François Blanchet before doing missionary work in Jacksonville, and Roseburg in Southern Oregon.

[1] After holding further posts in Oregon City and St. Paul, he was appointed the first president of the newly established St. Michael's College, a school for boys in Portland, in 1871.

[4] On February 27, 1885, Glorieux was named the second vicar apostolic of the old federal Idaho Territory (existed 1863-1890) and titular bishop of Apollonia by Pope Leo XIII (1810-1903, served 1878-1903).

According to his obituary in the local major daily newspaper of the Idaho Statesman: "The membership of the Catholic church in Idaho has multiplied itself eight times since Bishop Glorieux came to the state, and the number of its churches has increased in a like proportion...and he has been largely responsible for the building and maintenance of the several Catholic hospitals now carrying on their work in the state.