In the 1910 census I found them in Scranton Lackawanna Pennsylvania. Martha is 78 years old and living with Mary and her family. Mary is 53. I found it at Familysearch.org it is a free website. It shows they lived on 6th Avenue. It also looks like Mary is listed as the head of household with her children William, Calvin, George and a daughter Martha Howard living there also. She also took in boarders. I think this is a good place to look since Martha Bensley is fairly old. Try the local libarary there to see if they have access to any old obituaries. Also a mortuary in the area may be of help. I'm not familiar with that area since I live in Wyoming but they may be able to set you on the right path. I will continue looking on this end. Let me know if you come up with a hit. Happy Searching!