I doubt the Ancestry 1913 ER for Roseville polling place has actually been indexed... There's 17 pages, I have walked through looking for each name listed in Sands 1913, 1915 and I can find them on a walk through .... BUT I am having trouble reproducing any returns using the Ancestry search box, and limiting it to 1913 exact. Anyway, most of the surnames listed in Sands 1913 - 1915 for Dudley Street are matching up to the walk through with street as Dudley ... and on full walk through there's accountant, auctioneer, clerk, carpenter, typiste, estate agent, fitter, nurse, domestic duties, etc ...
One of my living ancestors, born 1910s, was raised on Boundary St, Roseville which is main thoroughfare now. Brick homes Federation style, outside toilet, 1/2 acre, vegetable patch in back yard etc..
ADD ... (as per phone call from said rellie) NO boarding houses in Dudley St Roseville 1913 BUT check if boarding houses in Leichhardt St Katoomba for William Feening.
So I did

... yes, boarding house keeper is occupation for a Mary Ann EVENS on Leichhardt St Katoomba, also with same surname (EVENS with E) George Alfred, labourer.
JM