midnight
`` This ghost business will have to stop ! '' But , unfortunately for his plans , his foot slipped on the smooth steel deck , and he went down in a heap . When he got up the ghost was nowhere to be seen . Washington , however , was still kneeling down and praying to be spared from the attack of the midnight visitor . Jack limped over to the colored man . `` Keep still , '' said the boy . `` It 's gone now .