1920 Census finds the following siblings residing at 1324 James St., St. Paul:
Johnston, Arthur - head, 32, tailor, Custom House
Johnston, Ada - sister, 30, home
Johnston, Lydia - sister, 25, music teacher
Johnston, Harry - brother, 23, commercial ?, wholesale merchandise
Johnston, Robert - brother, 18, house salesman, wholesale furniture
All born in Kentucky; parents born Sweden