[6] Upon his return to New York the following summer, Eustace was appointed an assistant pastor at Blessed Sacrament Parish in New Rochelle.
[3] During World War I, Eustace also served as a chaplain at the Pelham Bay Naval Training Station in New York City.
[7] At St. Joseph's, Eustace earned a reputation as a liturgical scholar, publishing an English translation of Pope Benedict XIII's Memoriale Rituum in 1935 and often serving as master of ceremonies to Cardinal Patrick Hayes.
[8] Eustace remained at the seminary for 21 years, until he was appointed pastor at Blessed Sacrament Parish in New Rochelle in September 1937.
[6] He received his episcopal consecration on March 25, 1938, from Cardinal Hayes, with Bishops Edward Kelly and Stephen Donahue serving as co-consecrators, at St. Patrick's Cathedral in New York City.
[4] When St. Bartholomew's fell into financial difficulties, Eustace recruited Eddie Cantor to give a benefit performance in 1950.