Where is the painting of 'A Special Pleader' by Charles Burton Barber kept?

hello my name is Jay, and i have bought a painting by Charles Burton Barber in a charity shop. its signed on the bottom right of the painting 'C Burton Barber 1893' i still do not know if this is the original painting or not and would love to get it seen by a professional but i do not where. if anyone has got any ideas please email me on xfikaj@live.com