In 1875 I find Marcus Johnson list as a boarder, 6 years old in Pinckney, E.D. 01 on page 7. He is living with John and Naomi Stalker/Stolker. John is 48 and Naomi is 38, no other people in the house.
Chester would have all ready died and Catherine must have been having trouble caring for him. I have not yet found her or Ashley.