I have done a bit of research on Alexander and Catherine Quail's descendants. Sorry to say I have not discovered where Alex died or is buried. I understand Catherine is in Greenwood Cem. in Hayward.
Their son Jim was my uncle, married to my mother's sister Gudrun Nyback. I knew them both very well in my youth. If you (or anyone else, for that matter) would like to exchange info, feel free to contact me at docooker@msn.com. — Don