Dated Fireplace

I found out that the bedroom fireplace was registered on 30th April 1877 (Seventeen years before the house was built). It is great to find out information like this. I'm presuming the other fireplace is the same but as it has so much paint on it, I can't tell. This is the website that helped me decipher the registration mark - www.oxfordarchitectural.co.uk/dating.htm