Browner Camross

My Browner ancestors lived in Palace East and one of them, James, ended up in Camross where he married and had a large family. I understand that a Catherine Browner from Palace lived with the family and died there in 1874. I understand that none of the children married and there were no descendants - all dying out in the 1930s and 1940s. I wonder whether there is a headstone or headstones over their graves and if so where might I find them? Many thanks in advance. Liam