Benjamin Charles Kane & Sarah Jane Snow

Here are my third great grandparents. On the left is Benjamin Charles Kane. He was born in 1832 in Tennessee. Some say he was born in Kentucky, but we believe it to be Tennessee. These photos were graciously provided to me by cousin Carol Long from Illinois. Supposedly Ben took this photo in haste as he was preparing for the Civil War and  forgot the price tag on the hat. Ben Kane died in July 1885 and is buried in the Whig Cemetery outside of Platteville, Wisconsin. On the right is Sarah Jane Snow. She was born in Massachusetts, some say New York, in May of 1938. It is said that she died on December 16th, 1912, but I don't believe that. I have seen no proof of her death and that date is the day her son George Winthrop Kane died. I have proof of his death. I do not know where Sarah Jane is buried. This is one of my top priorities. If anyone has any information on her, please contact me here in the comments. One other thing that I would really like to know is who that is in the picture around her neck? I think it's her father, Winthrop Snow, but it may be Ben Kane or her second husband, John B. Cardy. I don't think it looks like either husband which leads me to believe it may be her father whom I've never seen a photo of. I would appreciate any info on her parents too. I have them totally disappearing off of the radar after 1885. I would also like to have more info on Benjamin's family. I know he had three other siblings, two brothers and a sister. The sister married a Coates. The one brother owned a mine and was supposedly killed in a cave in, and the other, Francis (Frank) got married and was a carpenter around the Potosi area up until 1910. Ben's parents were Bartlett Kane (spelled Cain) and a woman named Lydia. I would like to know who this Lydia was. Any information on this family line would be appreciated.