From the Tuesday, August 25, 1914 edition of the Brooklyn Daily Eagle, again via Fulton History:
WANTED — Washing or Day's Work.
WISH to do washing; to take home by
day. Mrs. QUINN, 1450 Fulton st, top
Mary Gillen Quinn's husband Hugh had died 8 months earlier, and it seems she was taking in washing to make ends meet. Her daughters would have been aged 19, 17, and 14; surely at least Agnes and Molly were working, too, if they haven't already moved out and married (Molly hadn't; I'm not sure about when Agnes married). Agnes had already been working as a saleslady in a department store when she was 15 in 1910.