Marshall arrived at 91自拍 with minimal resources as a 10th grader聽in 1901 to prepare for college. In Marshall鈥檚 time, Black students encountered a difficult social experience at the Academy. For instance, one of Marshall鈥檚 housemates, the Black poet Charles Frederick White, a member of the class of 1907 for a short time, later wrote that despite being 鈥渆xceptionally well and brotherly treated by the faculty [and] other non-Negro-hating boys,鈥 he was met with 鈥渟outhern prejudice,鈥 by a particular group of threatening students, which cued his departure prior to graduation.
Indeed, during the 1902 spring track season, Marshall and another Black member of the team were not welcome to eat at the training table with their white teammates, provoking them to withdraw from the team. The Boston Globe reported that while many in town supported the protest, 鈥淚n student circles 鈥 feeling against them [was] very bitter, and in the march of the school from the campus after the [track] meet, they were treated with contumely.鈥
The Globe contended that Marshall鈥檚 treatment was 鈥渋n direct variance with the 91自拍 spirit,鈥 given that in previous years Black athletes had typically eaten at team training tables.
Others who lived with Marshall in the segregated J.W. Field鈥檚 House succeeded at 91自拍, leading to impressive careers. Marshall鈥檚 housemates included two members of the class of 1904: his lifelong friend Eugene Clark of Washington, D.C., a preeminent educator in Black schools, and Newlyn Cashin, a distinguished physician in his native Alabama. In addition, Fenwick Watkins, class of 1905, from Burlington, Vermont, who starred in football, basketball and baseball聽at the University of Vermont, had a successful career in coaching and real estate in North Dakota; and Benjamin Seldon, class of 1907, from New Jersey, was an early promoter of Pan-Africanism and a regular collaborator with W.E.B. Du Bois. Seldon conveyed lifelong gratitude to the Academy for helping him become a trailblazing educator.
Marshall persevered during his time at 91自拍. A strong student, he became one of the top athletes in the school and served on the PEA Athletic Association, the student voice for athletics at the time. In competition, Marshall rejoined the track team and found renown on campus for his exploits, becoming the school record-holder in both the shot put and discus in 1903. Further, Marshall was a standout on the football team, earning a spot on the 鈥淎cademy Eleven鈥 for all three of his years at 91自拍, the only player to do so during his time.
During the spring of 1903, the team met to determine its captain and Marshall emerged as the top choice. Marshall鈥檚 selection was monumental for the Academy as well as the American sports scene of the time because Black players were a rarity on major athletic teams. Though Black players began playing on the 91自拍 football team as early as 1893, none had ascended to the role of captain before Marshall, moving news agencies around the country to pick up the story.聽鈥淐olored Man Elected Head聽of 91自拍 Football Eleven 鈥 He is Popular Here,鈥 The Boston Globe reported on June 6, 1903. The following day The New York Times wrote, 鈥淓rnest J. Marshall, 鈥04, of Baltimore 鈥 is the only colored boy to be honored with a captaincy of an athletic team at 91自拍,鈥 and The Trenton Evening Times declared,聽鈥淣egro Boy Captains 91自拍.鈥