When Jason drops his niece off at school, he notes that "the bell had rung, and the last of them" - the other students - are going inside the building (188).
Quentin and Deacon discuss the time the black man marched in the parade "on Decoration Day" (82). Decoration Day was the southern name for Memorial Day, originally created to honor the veterans of the Civil War and in 1910 would have been celebrated on the last Monday of May. Deacon mentions both "the old vet'runs" and the "ladies" who organize the celebration (98). Deacon was was wearing a "G.A.R. uniform," i.e. the uniform of the Grand Army of the Republic, the Union army (82).
This man seems more a product of Mrs. Bland's imagination than a real person. One of the stories she tells about her son Gerald focuses on the loyalty of "his nigger," who pleads to be allowed to accompany his "marster" to Harvard (107).
Deacon tells Quentin that the reason he marched in the parade "on that Wop holiday" (presumably Columbus Day, 98) was to help his son-in-law "get a job on the city forces" as a "street cleaner" (98). Deacon also calls him "that son of a bitch," and implies he's very lazy (99).
The annual Harvard-Yale crew race is scheduled to take place a few days after June 2, 1910. Perhaps because Quentin is about use a river to drown himself, he thinks about the race, and the team - "them down at New London" - several times (77, 105, etc.).
Harvard's "proctor" appears in Quentin's section of when he remembers the way Mrs. Bland tried to have Shreve moved out of the suite he and Quentin share - because he didn't strike her as a suitable roommate for a Mississippi Compson. "The proctor reveals enough low stubbornness to insist on consulting Shreve first," and the change is never made (106). (This is an unusual use of 'proctor' - who is usually someone monitoring students taking an exam; perhaps Faulkner meant 'dean' or 'registrar.')
Mrs. Compson tells Quentin that "Louis has been giving [Caddy] lessons every morning" in driving a car (93). It is very unlikely that "Louis" here is the "Louis Hatcher" with whom Quentin goes hunting twenty years earlier, because that "Louis" is an old black man who carries but won't even use a hunting horn. Who Mrs. Compson's "Louis" is, however, is never made any clearer.
In the "Appendix, Compson:1699-1945" that Faulkner wrote in 1946, seventeen years after The Sound and the Fury was first published, he traces the Compson patrimony all the way back to Scotland in the 18th century. The 1929 novel, however, contains only a few references to the family history; Jason thinks, for example, about the "governors and generals" in the family past (230), and Quentin thinks that "one of our forefathers was a governor and three were generals" (101). It's likely that the Compson that Mr.
Benjy remembers seeing "a head come out" of the room where "Father was sick" (34). "It wasn't Father," he knows - though he doesn't know his father has just died - but someone Benjy has not seen before. He seems to be taking charge when he tells T.P. to take Benjy "out of the house," which suggests he might be a doctor (34).
Frony mentions "Sis Beulah Clay" to Caddy and her brothers when she tries to explain what a "funeral" is (33). When Sis Beulah Clay died, "they moaned two days" (33). "Sis" implies this woman belonged to the same church as Dilsey's family.