I haven't been to the Walker Art Gallery in Liverpool for many years and have made a resolution to go again soon. I think that the last time I was there was 1991 and I was particularly taken with two paintings. One of them I recalled from previous visits - a self-portrait by Anton Raphael Mengs (1728-1779) from 1774 which really talks to you.
The other was Margaret Bernardine Hall's 'Fantine' from 'Les Miserables' (1886). It has a haunting quality that insists one look at it repeatedly.