[4] He remained in Ohio for a few months to better his knowledge of English, first serving as assistant pastor in Temperanceville and Chillicothe.

[5] From November to December 1884, he attended the third Plenary Council of Baltimore as a theological consultant to Archbishop Francis Xavier Leray.

[4] He received his episcopal consecration on March 19, 1885, from Archbishop Leray, with Bishops John Neraz and Nicolaus Gallagher serving as co-consecrators, at St. Louis Cathedral in New Orleans.

[3] He invited several religious orders to the diocese, such as the Sisters of Divine Providence, Carmelites, and Jesuits, who established schools in Alexandria, Mansfield, and Shreveport, all in Louisiana.

[3] Durier also established seven new parishes and finished construction on the Cathedral of the Immaculate Conception in Natchitoches, which he consecrated in September 1892.