This refers to the "Spring Garden" or "Curtman Island" of the Osage River incident in which Wiley Shumate, leading Crabtree's old outfit, angered at the recent public execution of one of his guerrillas in Jefferson City a few days before, captured 16 newly-sworn-in members of the Volunteer Missouri Militia. Then Shumate released all but eight men whom he knew to be members of the hated "Union League" of those parts, and shot those eight to death.
Those eight, including Richard Crisp, are all named in "Judge Jenkins History of Miller County, Missouri" published in 1971.
I would guess that the reason the Auditor's Officer of the War Dept. in Washington added the names was that immediately after the war the Captain Babcoke you named obtained a writ from the Union governor to take some of his men to Phelps County and arrest there a man wanted for the torture killing of a Miller County farmer back in April or May 1865. Babcoke didn't find the named man, so he arrested the man's father and a couple of brothers, then shot them to death on the road to Rolla, claiming they were trying to escape. This whole deal committed just after the end of hostilies in August 1865 stunk badly and invited Federal investigation, whereupon I would guess the investigator used those cards to search out the facts of the case.