In 1935 Rev. Brother Adelard, director of hockey at Mount St. Charles Academy, scheduled a game with New Rochelle, NY High School booked with the national schoolboy championship at stake. New Rochelle High School had romped to the Westchester County championship defeating four of the best teams representing New York City high schools. Surging along in their relentless manner, the Flying Frenchmen from Mount St. Charles blasted their way to a 6-0 victory led by Al Thurier's two goals and one assist at the Rhode Island Auditorium. Tommy Sheehan, the only Irish member of the Flying Frenchmen, tagged on the sixth marker. They would also annex the state hockey crown that same weekend by downing LaSalle 4-0 for the title.
In March 1939 Mount Saint Charles embarked for Atlantic City, NJ in a quest to duplicate the 1934-35 team and win the National High School Hockey Championship. They played Atlantic City High School in a two game total goals series. A crowd of 4000, largest ever to witness a scholastic ice hockey game in that city, saw Mount humble the home team 8-3 with Dick Rondeau notching three goals. They disposed of Atlantic City High 4-2 in the second match of their home and home series to win the title at the Auditorium. Norm Desaulniers led the attack with two goals and goaltender Danny O'Brien was a standout stopping 28 shots. The Flying Frenchmen had all six positions on the All-RI hockey team for 1939.
In 1939-40 the Flying Frenchmen aimed at making in two national titles in a row when St. Francis Prep hockey team arrived from New York via boat. Going into the contest riding a winning streak over two seasons, marred by one tie, the New Yorkers were a formidable opponent. However, displaying their usual systematic goal scoring parade, the Mounties racked up four goals in the first and third period to win 8-2 and lay claim to the National Schoolboy Hockey crown at the Auditorium in front of 1500 fans. Rollie Lemire highlighted the offense by tallying four times while Andre Tremblay added three more.